Martek Chisel and Plane Blade Sharpener Chstd Chisel Plane Blade Sharpener produces sharp edges for chisels and plane blades up to 2.3/8in (60mm). It is portable and easy to use with your own power drill. Honing wheel and grinding stone are included. It has a unique 'Magfast' tool holder. It sharpens at the correct angle of 30 degrees.