This guide will clamp blades and chisels anywhere from 0 – 63mm by sandwiching the blade between the base and clamp. The brass nuts and nylon washers make it easy to have good clamping pressure without over-tightening and damaging your tool or the guide.
The 40mm-wide brass roller provides stability when rolling on the stone. This can be removed to expose a ledge that can then be run against your bench grinder tool rest to use as a straight grinding jig.