Smiths Diamond Retractable Sharpener Blue/Gray. This Knife Sharpener from Smiths features an unbreakable diamond coated steel rod which is specially designed to sharpen all types of knives including serrated. Multiple layers of medium grit monocrystalline diamonds makes sharpening quick and easy while still giving you that razor sharp edge on your knives tools or hooks. The rod is reversible and can be adjusted to variable lengths. The Smith's Retractable Diamond Knife Blade Sharpener has a sharpening groove for hooks and a shirt pocket slip for easy storage. Specifications for Smiths Diamond Retractable Sharpener: Manufacturer: Smiths Grit: 400 Color: Gray/Orange Features of Smiths Diamond Retractable Sharpener Manual Features: Tapered diamond coated rod sharpens serrations Half-round diamond coated rod sharpens straight edges Sharpening Groove for hooks Aluminum housing protects the sharpening rod Pocket clip for easy storage Reversible rod stores in handle Grit: Medium - Diamond 400 Grit Package Contents: Smiths Diamond Retractable Sharpener DRET Smiths SP-51446: Diamond Retractable Sharpener Blue/Gray