G Sharp Sharp Edge Precision Chisel Plane Blade Sharpening System 3mm to 85mm Sharpedge Chisel Sharpening System The Sharp Edge is a simple and trouble-free way to sharpen chisels and plane blades from 3mm to 85mm wide. Light, robust and easily transported, the sharpener is quick to set up, and features a unique sharpening angle that can be varied from 23 to 90 degrees. The Sharpedge Chisel Sharpening System aka Sharp Edge is very easy to use whether you are right or left handed. Once set up, you can, if required, achieve the exact same angle every time and it will also be square across the width of the blade, ensuring that your work is as accurate as possible. Should you choose to change the angle, this is easy and very quick to do. Replaceable diamond hones and an extra .