Best Diamond Knife Sharpeners of 2025

The Kota Japan 12 in. Diamond Carbon Steel Professional Knife Sharpener Rod features diamond electoplating for precision blade sharpening, an oval shape for higher sharpening efficiency, and requires less force than most sharpening steel. Its elegant design is a pleasing addition to any kitchen or work area.

The Chef'sChoice 4643 Knife Sharpener is a 2-stage, manual sharpener that uses 100% diamond abrasives to sharpen and hone straight edge and serrated knives, as well as sports and pocket knives. Its advanced CrissCross sharpening technology ensures an ultra-sharp 15 and 20-degree edge by using diamond abrasive wheels that sharpen simultaneously. The precise bevel angle control and separate sharpening and honing/polishing stages create a razor sharp, arch-shaped edge that is stronger and more durable. Its Soft Touch handle provides an easy and secure grip, and its compact design makes it convenient to use and store.

SHARPAL Diamond Stone is a heavy-duty sharpening tool that features a dual-grit diamond surface, with 325 grit for quick edge setting and 1200 grit for honing. The industrial monocrystalline diamonds are electroplated onto a steel base, making it up to 5 times faster than traditional oil or water stones. Its MirrorFlat technology guarantees long-lasting even contact with knives or tools, and it can sharpen all hard materials including high-speed steel, carbide, ceramic, and cubic boron nitride. It comes with a storage box that has a non-slip rubber pad for use as a base while sharpening and includes a sharpening angle guide with 4 universal angles (14°, 17°, 20°, 25°). With a 3-year warranty and superior after-sale service, SHARPAL Diamond Stone is a reliable and cost-effective way to obtain a sharp edge.

KitchenIQ 50825 Diamond Deluxe Edge Grip 2-Stage Knife Sharpener is a compact, black knife sharpener that is designed with a patented V-Grip for use on the edge of your counter or flat surfaces. It has a preset ceramic slot to hone and refine the edge of the blade, and a preset diamond (coarse) slot to quickly set the edge of the blade. It can be used with straight, German, and serrated edge knives. The soft grip handle provides a secure grip even with wet hands. It sharpens both straight and serrated blades.

The Chef’sChoice Trizor 15XV Professional Electric Knife Sharpener is a 3-stage kitchen knife sharpener that uses diamond abrasives to sharpen and hone edges. It applies an ultra-sharp edge to 15-degree knives and easily converts 20-degree knives to a finer 15-degree edge for easier cutting. The flexible spring guides hold the blade at the ideal angle during use, resulting in longer-lasting, arch-shaped edges down the full length of the blade. It is easy to use and comes with a simple on/off switch.

The ZWILLING Diamond Sharpening Steel is a high-quality knife sharpener designed to quickly produce a very sharp edge. Its diamond-coated steel ensures efficient sharpening, while the flat surface provides more contact with the edge, resulting in the same excellent results as a traditional rod shape but with fewer strokes. This sharpening steel is also incredibly easy to use and maintain, allowing you to safely keep your knives sharp. With its German engineering and no assembly required, the ZWILLING Diamond Sharpening Steel is a reliable and convenient tool for any kitchen.

The SHARPAL Diamond Knife Sharpener is a professional-grade tool designed to maintain the sharpness of your knives. With a surface coating of fine diamond particles, this sharpener offers precise and efficient sharpening, extending the lifespan of your knives. It is suitable for sharpening various hard materials, including ceramics and hard alloys. The ergonomic handle and round sharpening bar make the sharpening process safe and easy. After use, simply dry the diamond surface and store it in a cool, dry place. With a 3-year warranty and superior after-sale service, SHARPAL ensures a cost-effective way for consumers to achieve a sharp edge.

The Sharpeak Diamond Sharpening Rod is a high-quality tool designed to effectively sharpen knives of all hard materials. With its diamond electroplating technology, this rod provides an extremely fine sharpness for quick restoration of cutting performance. The durable Extra Fine 1200 grit monocrystalline diamonds not only realign edges and remove burrs, but also effectively sharpen and touch up blades. The rod has a length of 12 inches, making it suitable for sharpening a wide range of knives. It also features built-in 20 degree angle guides for consistent and accurate sharpening angles, ensuring your knives stay razor-sharp. With its reliable diamond coating and superior craftsmanship, the Sharpeak Diamond Sharpening Rod is a must-have for any kitchen.

The Lifeholic Diamond Sharpener is a versatile 5-in-1 sharpening stone that is perfect for all your sharpening needs. It features a 400# coarse sharpening side for repairing severely dulled blades, and a 1000# fine sharpening side for re-sharpening edges and deburring blades. The lightning slot in the middle of the handle is specially designed for scissors grinding, while the tungsten steel blade sharpens on the left waist of the handle restores the knife's V-shape. On the right waist of the handle, the ceramic blade sharpens for polish and eliminates burrs on the metal blade. The honeycomb design ensures that dust generated during the grinding process does not affect the sharpening. With its portable size and convenient storage, the Lifeholic Diamond Sharpener is a must-have kitchen tool for both indoor and outdoor use.

The ZUCONKITCH Diamond Knife Sharpener is essential for anyone looking to restore dull knives effortlessly. Its design allows you to easily realign your knife's edge, ensuring clean cuts every time you cook. Made from durable carbon steel with a rust-resistant coating, this sharpener is built for long-lasting use. The comfortable grip and stable non-slip base make sharpening safe and convenient. Plus, maintaining it is a breeze—just wipe it down after use. With this sharpener, you can keep all your kitchen knives, from chef's to carving, in prime condition for any culinary task.