3mm to 67mm and is used to achieve a perfectly honed bevel edge wood chisel or plane iron.
Bevel edged wood chisels and plane irons are normally manufactured with the blades ground at 25º, but not honed ready to cut wood at 30º. Therefore it is essential that all chisels and irons are honed before use.
The lower clamp is used for chisels and the upper clamp for plane irons.
