This set of professional graving or engraving chisels are handmade by Narex of the Czech Republic. Blades are made of Chrome-Vanadium tool steel and heat treated to a hardness of 61-62 HRc. The edges are hand sharpened and lapped with abrasive paste and an Arkansas stone. Handles are stained and waxed European Beech wood. Chisel handles have a flat on the back to prevent rolling off the bench. These chisels are designed to be used with hand pressure only. Item # Tool Blade Width Blade Length Handle Length Handle Diameter 823000 Flat graving chisel 4mm 70mm 82mm 40mm 823300 Gauge graving chisel 3mm 70mm 82mm 40mm 823400 Gauge graving chisel 6mm 70mm 82mm 40mm 822510 Carving knife 12mm 40mm 135mm 823500 Gauge graving chisel 8mm 70mm 82mm 40mm 823600 Angular V graving chisel 3mm 70mm 82mm 40mm WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov