Best Plumb Bobs of 2026

Harry Stack Avatar
Harry Stack
Last Updated: Jan 12, 2026

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Plumb bobs are an essential tool for anyone working in construction, carpentry or any other field that requires precise measurements. These small, weighted objects are suspended from a string or a line and are used to establish a vertical reference point, ensuring that walls, posts, and other structures are perfectly straight. Plumb bobs come in a variety of sizes and shapes, from traditional brass or steel models to modern laser-guided versions. They are easy to use, highly accurate, and indispensable for achieving professional results in any building project.

At a Glance: Our Top Picks

Swanson Tool Co PB008B Brass Plumb Bob Cover #TOP 1
Swanson Tool Co PB008B Brass Plumb Bob
ftb score rating icon 9.9
General Tools 790-8 Hexagon Steel Plumb Bob Cover #TOP 2
General Tools 790-8 Hexagon Steel Plumb Bob
ftb score rating icon 9.8
TAJIMA Plumb Bob Setter - 14 oz (400g) Cover #TOP 3
TAJIMA Plumb Bob Setter - 14 oz (400g)
ftb score rating icon 9.6

Top 10 Plumb Bobs

#TOP 1

Swanson Tool Co PB008B Brass Plumb Bob

Swanson Tool Co PB008B Brass Plumb Bob Cover
Swanson Tool Co PB008B 8 ounce Brass Plumb Bob with String

The Swanson Tool Co PB008B Brass Plumb Bob is a durable tool made of solid brass with a replaceable hardened steel tip, and a lacquered finish to resist corrosion. It has a removable head for easy string attachment, ties to any string or line, and comes with a 20' string and hook. It is a precision accurate tool that is useful for excavation contractors, surveyors, and foundation contractors.

What We Like
Heavy and stable design
High-quality brass material
Strong, durable string
Replaceable tip feature
Accurate and reliable performance
What We Don't Like
Loose tip threads
Basic string quality
#TOP 2

General Tools 790-8 Hexagon Steel Plumb Bob

790-8
Steel
8 Oz
General Tools 790-8 Hexagon Steel Plumb Bob Cover
General Tools 790-8 Hexagon Steel Plumb Bob, 8 Ounce

General Tools Plumb Bob is a professional quality tool that is ideal for masonry, carpentry, and surveying. It features a hexagonal body made of cold-drawn steel with nickel plating, and a removable cord cap for easy replacement. The plumb bob weighs 8 oz, is 4 inches long and 7/8 inches wide, and comes with a 10-foot long 3mm braided cord for convenience.

What We Like
Accurate and precise
Good weight and balance
Affordable price
Durable design
Easy to use
What We Don't Like
Lower quality included string
Small thread hole
#TOP 3

TAJIMA Plumb Bob Setter - 14 oz (400g)

PZB-400GP
14-Ounce
TAJIMA Plumb Bob Setter - 14 oz (400g) Cover
TAJIMA Plumb Bob Setter - 14 oz (400g) Magnetic Plumb-Rite with 14.5 ft Auto Recoil Cord & Quick-Stabilizing Bob - PZB-400GP

The TAJIMA Plumb Bob Setter - 14 oz (400g) is a commercial-grade plumb bob that features a quick-stabilizing 14-ounce bob that steadies within 6 seconds. It also includes a setting pin for wood/drywall, a strong magnet for steel surfaces, and a hook for nails or studs. The plumb bob has a 14.5 ft self-retracting line for quick, easy storage and an elastomer-wrapped setter for added drop protection and secure grip.

What We Like
Durable construction
Easy tension adjustment
Strong magnet
Compact and portable
Precise measurements
What We Don't Like
Large size for some uses
#TOP 4

Johnson Level & Tool 116 Plumb Bob

Johnson
Black
16 oz.
Johnson Level & Tool 116 Plumb Bob Cover
Johnson Level & Tool 116 Plumb Bob, 16 oz., Brass Finish, 1 Pack,Black

The Johnson Plumb Bob is a practical tool used by foundation contractors, excavation contractors, and surveyors for various applications. Its hardened steel tip ensures accurate measurements, improving work quality and efficiency. The brass-plated body adds durability and protection against corrosion, while the lacquer finish extends its lifespan. With easy installation, the hardened steel tip and cap can be quickly removed and replaced for connecting a string or line. Weighing 16 oz., this plumb bob is ideal for carpentry, masonry, surveying, and fencing, offering you a versatile solution for your indoor and outdoor needs.

What We Like
Well-machined construction
Sharp, replaceable steel tip
Attractive high-polish finish
Reliable for DIY tasks
Durable and long-lasting
What We Don't Like
Packaging may arrive damaged
Minor rust or imperfections
#TOP 5

AWF PRO Plumb Bob Kit

AWF 5000
AWF PRO Plumb Bob Kit Cover
AWF PRO Plumb Bob Kit - 16 oz and 8 oz Solid Brass Plumb Bobs, 14 ft Retractable Line Reel with Magnetic Base, 2 Pencils, Pencil Sharpener, Carrying Case

The AWF PRO Plumb Bob Kit is a high-quality kit that comes with two precision-made solid brass plumb bobs, a 14 ft retractable line reel with a magnetic base, two pencils, a pencil sharpener, all packaged in an attractive, durable, zippered protective case. The plumb bobs have 2 replaceable steel tips and use the same interchangeable caps and tips, making switching sizes quick and easy. The retractable line reel comes with a bright orange braided nylon cord, rare earth magnets, and a fold-out bracket to hang the reel. The kit is easy to use and offers great value.

What We Like
Excellent build quality
Accurate measurements
Responsive customer service
Useful accessories included
Easy to transport
What We Don't Like
Retractor may occasionally stick
Not the cheapest option
#TOP 6

Stanley 8-Ounce Brass Plumb Bob

47-973
Multi
One Size
Stanley 8-Ounce Brass Plumb Bob Cover
Stanley 47-973 8-Ounce Brass Plumb Bob

The Stanley 8-Ounce Brass Plumb Bob, manufactured in Taiwan, is a reliable tool for framing, deck building, plumbing, transit location, and construction applications. Its screw top simplifies the attachment of string to the center of the plumb, while its polished-lacquer solid brass construction resists rust. The thru-hole ensures easy tightening, and the replaceable, hardened steel tip provides longer life, with an extra tip included. It weighs 8 ounces and comes with a lifetime limited warranty.

What We Like
Solid brass construction
Excellent durability
Accurate vertical alignment
Extra replacement tip included
Versatile for various applications
What We Don't Like
Stabilizes slowly compared to heavier models
No string included
#TOP 7

KH866 Magnetic Retractable Plumb Bob

30102025TTA
KH866 Magnetic Retractable Plumb Bob Cover
Retractable Plumb Bob With 6M/19.7ft String Magnetic Plumb Rite Setter – 8.68oz Self-Retracting Plumb Bob with Auto Recoil Cord, Quick-Stabilizing Line Reel for Construction, Plumbing & Leveling Tasks

The KH866 Magnetic Plumb Bob is a handy tool designed to help you achieve precise vertical alignment for construction, plumbing, and carpentry projects. It features a 19.7ft self-retracting line with a locking lever, giving you the flexibility to work at various heights while keeping the line secure and tangle-free. The quick-stabilizing magnetic design ensures the plumb bob settles fast and steady, so you get accurate measurements with less swinging. Plus, it comes with multiple attachment options like strong magnets for steel, pins for wood or drywall, and hooks for nails, making it easy to use on different surfaces and in various situations.

What We Like
Self-retracting locking line
Quick stabilization
Magnetic and pin attachments
Versatile surface compatibility
#TOP 8

Johnson Level & Tool Steel Hexagonal Plumb Bob 5 oz

Johnson
Silver
Pack of 1
Johnson Level & Tool Steel Hexagonal Plumb Bob 5 oz Cover
Johnson Level & Tool 05 Steel Hexagonal Plumb Bob, 5 oz., Steel Finish, 1 Pack

The Johnson Steel Hex Plumb Bob is a handy tool for anyone working in construction or surveying. It helps you create a straight vertical line by hanging it from a string, making it easier to align points precisely. Its unique hexagonal shape stops it from rolling away, so you get accurate readings every time. Made from durable steel with a corrosion-resistant finish, this plumb bob lasts through tough jobs and outdoor use. Plus, it’s simple to attach to a string by removing the cap, and you can even use it with Johnson tripods for leveling your instruments, adding convenience and efficiency to your work.

What We Like
Hexagonal non-roll design
Durable steel construction
Corrosion-resistant finish
Easy string attachment
Compatible with tripods
What We Don't Like
Minor imperfections possible
Slightly less than perfect accuracy
#TOP 9

Plumb Bob Magnetic with Retractable String and Locators

plumb bob
14.5ft(4.5m)
10.7oz(305g)
Plumb Bob Magnetic with Retractable String and Locators Cover
HCCMLOVE Plumb Bob Magnetic -10.7 oz(305g) Plumb Rite With 14.5 ft(4.5m) String,Sharpener,2 Pencils,Line Reel Used in Construction Can Automatically Stretch the Line and Quickly Stabilize the Plumbob

The Plumb Bob Magnetic is a versatile tool that can be used in various construction activities. It has a high-quality quick stabilization 10.7-oz bob that steadies within 6 seconds for establishing a perfect vertical line. The plumb bob is retractable, adapts to different specifications of plumb bobs, and maintains balance quickly. It includes positioning pins for wood/drywall, strong magnets for steel surfaces, and hooks for nails or studs. The locator wrapped in elastic material provides additional drop protection and a firm handle. The plumb bob setter comes with a 14.5 ft. self-retracting line and 10.7oz(305g) plumb bob.

What We Like
Easy to use
Time-saving string retraction
Strong magnet attachment
Durable build quality
Accurate vertical alignment
What We Don't Like
Plastic string connector
Bulky case
#TOP 10

Johnson Level & Tool 08 Steel Hexagonal Plumb Bob

Johnson
Silver
Johnson Level & Tool 08 Steel Hexagonal Plumb Bob Cover
Johnson Level & Tool 08 Steel Hexagonal Plumb Bob, 8 oz., Steel Finish, 1 Pack*

The Johnson Level & Tool 08 Steel Hexagonal Plumb Bob is a practical tool used for establishing a straight vertical or plumb line by connecting it with a string. Its hexagonal machined body prevents it from rolling off, ensuring accurate measurements, improving work quality along with maximum efficiency and safety. Made from durable, high-quality steel, it has a corrosion-resistant steel plated finish that adds to its lifespan. The installation is simple, and it can be used for a variety of indoor and outdoor applications, including carpentry, masonry, surveying, and fencing.

What We Like
Good value for money
Heavy and durable
Easy to use
Accurate alignment
Traditional reliable design
What We Don't Like
String not included
Dental floss not strong enough
Buying Guide Image

A Guide to Selecting the Best Plumb Bobs

When you work on metal, you need a magnet. There are some tools, which come with magnets that are stuck to them. Other types do not have magnets. This is why you will have to improvise.

You can use duct tape in order to hold it in the right position. You put the thing on the bar to let the string hang from the edge. Before you opt to buy a plumb bob from the market or from an online store, you have to take into consideration a few important factors.

To make sure that you buy the best tool, follow these guidelines, which will help you choose the right type of plumb bob for your work. Read on!

Uses Purpose

Remember, you must think first why you need a plumb bob. If you are an engineer or DIY worker, then in both cases, you need a different kind of plumb bob. For instance, being a civil engineer, you need more precision and thus can ignore the price of the size of the tool.

On the other hand, if you need this tool for your DIY project, you should consider both the weight and size of the tool so that you can easily carry it around.

Plumb Bob Material

The material for this type of tool is typically metal. If you are looking for something heavy, you need to buy the one that is made of brass. The lighter ones are usually made of steel material.

If you are working outdoors, you need a heavy plumb bob because it can be handy enough. The reason is that the lightweight plumb bob can be swayed easily by the breeze in outdoor locations. For indoors, you can go for a lightweight tool as it takes less time for settling and you can easily carry it in the toolbox.

Type of String

The thread used for this tool is vital because when it is too stretchy, then the accuracy of the plumb bob will be hampered. If it is absorbing a lot of moisture from the air, then it will get stretched.

If the thread has twisted ropes, then it can be spun. If the line is stiff, then it will cause the vertical line to get bent a little. If you are going to buy an inexpensive version, then you might get in trouble.

Price of the Plumb bob

Lastly, the tool is simple to use and there are very few reasons for purchasing an expensive one when you can easily get your job done with an affordable tool. Good Luck!

Frequently Asked Questions (FAQs)

1. What are the rules for plumb bob?

To use a plumb bob, hold the cuboid with the plumb line running through it at the top of the measured plane and let the bob drop down to the base. Make sure the plumb line is undisturbed and parallel to the surface. The bob should neither rest on the surface nor be set apart from it.

2. Do people still use plumb-bobs?

Yes, plumb bobs are still used today despite the availability of spirit levels and lasers. They are useful for drawing long straight lines, ensuring wallpaper is glued straight, or checking the alignment of large warehouse shelves.

3. What are the disadvantages of a plumb bob?

One disadvantage of a plumb bob is that the replaceable tip and other screw-on parts are small and can be easily misplaced or lost in a toolbox.

4. Why use a plumb bob instead of a level?

A plumb bob is used to align things properly using gravity. It consists of a weight, usually with a pointed bottom, connected to a string or plumb line. The weight follows the path of gravity and hangs straight down from the top, allowing for accurate vertical measurements.

Editor's Notes

During our plumb bob research, we found 24 plumb bob products and shortlisted 10 quality products. We collected and analyzed 29,258 customer reviews through our big data system to write the plumb bobs list. We found that most customers choose plumb bobs with an average price of $14.35.

The plumb bobs are available for purchase. We have researched hundreds of brands and picked the top brands of plumb bobs, including Swanson Tool Co., Inc, General Tools, Tajima, Johnson, AWF PRO. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Harry Stack Avatar

Harry Stack owns a small hardware store, his career landed him a depth of knowledge in categories such as tools, equipment, machinery and hardware. In his spare time, he usually repairs furniture, safes and appliances, and he knows how to make simple repairs to plumbing or electrical fixtures. His hobbies also include woodworking and fishing.