You may need to remove central cap from the clamp bar to use clamps in the center

It's available in different stone bundles

Small Table Module for Hapstone modular sharpeners is based on the three-point guide similar to Hapstone M2 knife sharpener

Knives can be sharpened at exactly the same angle every time

leading edge core upgrade for work sharp ppa back-in-stock You may need to removeLeading Edge Core Upgrade enhances the capabilities of WorkSharp Professional Presicion Adjust knife sharpeners with features of the Leading Edge sharpening platform. Core Upgrade offers a magnetic working table with a three point knife guide and can be extended with Leading Edge attachments. Core Upgrade utilizes a magnetic block 1. 5 x 0. 5 x 0. 25 inch with powerful N52 grade neodymium magnets. Knife Guide allows you to position a knife precisely