Best Gage Blocks of 2026

The Accusize Industrial Tools 81 Pcs Steel Gauge Block Set, Grade B, P900-S581 is designed for accuracy and longevity. The set is made of high-quality steel, hardened to HRC 64, and resistant to corrosion and defacement. The set includes 81 pieces and is accompanied by a certificate of inspection for each block, with deviation listed. The blocks meet or exceed federal specification ASME B89.1.9-2002. The set is calibrated for use at a temperature of 68 degrees F (20 C).

The WEN 10423 123 Blocks are essential tools for machinists, woodworkers, metalworkers and more. This set of two blocks includes 5 threaded 3/8-16 UNC cross-drilled holes, allowing users to calibrate equipment, space workpieces, and collect exact measurements. Each block measures 3 by 2 by 1 inches in size, making them easy to handle and carry to various job sites.

The WEN 81-Piece Steel Gauge Block Set is a workshop-grade set that includes 81 individual steel blocks of various sizes ranging from .05 inches to 4 inches. It comes with a unique certificate of inspection following ASME B89.1.9 standards, allowing you to calibrate measuring equipment with a tolerance of +0.25 μm to −0.15 μm. The hard-shelled carrying case keeps the blocks organized and protected from contaminants, making it convenient to carry around.

The HFS Precision Gauge Blocks offer exceptional accuracy and durability for your measurement needs. Made from hardened alloy tool steel, these blocks resist wear, stains, and rust, ensuring they stay reliable over time. Each block is crafted with extreme precision, allowing you to measure with confidence down to millionths of an inch. Plus, the set comes with ISO-17025 certification and individual serialization, giving you peace of mind about traceability and quality. Whether you're calibrating tools or checking dimensions, this set gives you the reliable, professional-grade performance you need.

The Aspaton Calibration Blocks offer precise measurements with 23 holes sized 1x2x3 inches, ensuring accuracy within one ten-thousandth of an inch. This high level of precision helps you maintain exact calibration for your equipment, reducing errors. Made with high hardness material, these blocks resist deformation and wear, so they stay reliable over time. They are also designed for ease of use, allowing you to quickly handle and apply them during calibration tasks. With a pair of these parallel blocks, you get durable and precise tools that make your equipment calibration straightforward and dependable.

The marddpair 1x2x3 Parallel Blocks are precision tools designed to help you achieve exact measurements and setup in machining or milling projects. With dimensions of 1 by 2 by 3 inches, these blocks provide a reliable size reference. Their surface finish is very smooth, ranging between 6 and 16 microinches, which ensures minimal friction and accurate contact points. Made from hardened steel treated to a high hardness level, these blocks are durable and resistant to wear. You’ll appreciate their exceptional accuracy and squareness on all sides, staying within a fraction of a thousandth of an inch, which is essential for precise machining tasks.

Introducing the Mitutoyo Gage Blocks set, perfect for checking spindle wear on OD micrometers. These high-carbon, high-chrome steel blocks come thermally stabilized to maintain accuracy over time. Each block is laser-etched with a serial number for traceability. Sized for various spindle rotations, they ensure precise measurements and durability. The Mitutoyo Gage Blocks offer convenience and reliability for your measurement needs.

The Mitutoyo Steel Rectangular Gage Block is an ASME Grade AS-1 block that meets the standard for flatness, length, parallelism, and surface finish. It is made of high-carbon, high-chrome steel, providing high hardness and wear-resistance. The rectangular base ensures accurate wringing, and the block's nominal length is indicated with laser-etched, black characters. The identification number is also etched in the block for traceability.

The Accusize Setup Blocks offer a 15-piece set of aluminum blocks ranging from 1/16" to 3/4", including a handy 1-2-3 block. These blocks provide precise thickness with an accuracy of .0001", making them perfect for setting up fences and gauges in woodworking projects. Their black anodized finish not only adds durability but also gives them a professional look. With this set, you can quickly and accurately adjust the height of saw blades, dado saws, router bits, or drill bit depths, saving you time and ensuring consistent results in your woodworking tasks.

The Mitutoyo Steel Gage Block is designed to provide precise measurements for your projects. It comes with a certificate ensuring it meets strict ASME standards for flatness, length, and surface quality, giving you confidence in its accuracy. Made from high-carbon, high-chrome steel, this block is highly durable and resists wear, so it stays reliable over time. Its rectangular base makes it easy to wring and stack with other blocks, simplifying your measuring tasks. Plus, the clear laser-etched length markings help you quickly identify the size without guesswork, making your work smoother and more efficient.