Trend DWS/HG/SET Diamond Honing Guide Set Diamond honing guide set Ensure correct angle is maintained on chisels and plane irons when used with diamond whetstone. Precision roller with alloy body which self-centre clamps chisels from 3/8 inch (10mm) to 2-3/8 inch (60.3mm) wide. The setting device is preset for 25 degree, 30 degree and 40 degree angles.  Positive location for roller and blade.  Adjustable stop for setting blade angle.  Use with 63mm (2 1/2 inch) wide x 178mm (7 inch) long bench stones or workshop stones. Not for use with Firmer chisels or short blade (Butt) chisels