Universal 4" to 6" Stone Holder for Work Sharp Precision Adjust

Take your sharpening game to the next level with our 4" to 6" Universal Stone Holder, designed specifically for the Work Sharp Precision Adjust system.

The stock stones work fine, but they’re limited in grit range. This adjustable stone holder lets you use any sharpening stone between 3.75" (95mm) and 6.3" (160mm) long and 1" wide, giving you full freedom to reprofile, refine, or polish your knives with precision. Whether you’re working with coarse stones or ultra-fine abrasives, this holder gives you total control over your sharpening process.

Simply unscrew the adjustment screw to fit your stone, tighten gently, and you’re ready to sharpen.

Angle Block for Consistent Precision

Each kit includes an angle block that keeps the adjustment screw from rotating during sharpening. The screw rotates freely with little resistance, but the angle block slides on easily and holds everything steady until you’re ready to make a change.

Angle Block Dimensions: 23mm (0.9") diameter × 30mm (1.2") tall

Phone Tray for Angle Measurement

We also include a phone tray that allows you to use your smartphone as an inclinometer for precise angle setting. Because stone thickness varies, this tray ensures your sharpening angle stays accurate to within 0.1°. Whether you prefer 15°, 20°, or 17.5°, you can easily maintain consistency between stones and knives.

Phone Tray Dimensions: 75mm × 90mm (≈ 3" × 3.5")

Note: Some phones with protruding cameras (like iPhones) will extend slightly beyond the tray;. this is normal. Use two hands when adjusting: one to hold the sharpener level and another to fine-tune your angle.

With the Universal 4" to 6" Stone Holder, angle block, and phone tray, you get a full kit built for serious sharpening enthusiasts who demand accuracy, stability, and flexibility.

Disclaimers

Sharpening stones are not included. Images showing stones are for demonstration only.

This item is made of PLA plastic, which is renewable and biodegradable (see our FAQ for more details).

Sharpen with Precision

Pair this platform with our other knife sharpening accessories; including stone holders, trays, and storage cases, to create a complete sharpening setup.

Explore out Knife Sharpening Accessories collection.