• Specially made diamond coated cone.
• Significantly improves chisel performance.
• Maximum sharpening size of 13 mm.
• Suitable for most Taiwanese and Japanese mortiser chisels.

Sharpening a mortise chisel significantly improves performance. We can recommend this pair of specially made diamond coated cones for most Taiwanese and Japanese mortise chisels, and Veritas square hole punches. 

Instructions:
Use the cones in a drill press or your mortiser if you have a chuck adaptor (a handheld drill is neither suitable nor safe). Clamp the bit vertically and securely, or drill a hole in a block of wood the same diameter as the chisel’s shank. The chisel must be held firmly and perpendicular. Fasten the coarse cone in the chuck and align it with the chisel so it centres exactly in the end of the chisel, do this BEFORE switching on. Running at low speed (150 to 250rpm), gently lower the cone until it just makes contact with the mortice bit. Carefully grind until you obtain a clean surface around the entire bevel. Use a fine flat stone lap the sides of the bit to remove any burrs.