Welcome to Japanny - Best Japanese Knife!
Material: plastic, ceramic
Clip surface:about 100mm
Clamp slot thickness:4mm
Clip surface width:18mm
Feature: Durable with ceramic material Fit for whetstone and diamondstone
Using instruction: 1.Fix angle to the appropriate of knife blade.
2.Bote hands hold the handle and the back of the knife, ceramic part contact the surface of whetstone or diamond,make knife blade into a fixed angle, move the blade, back and forth over the sharpener by using litter pressure.