These mortise chisels are made by Narex of the Czech Republic and are of exceptional quality. The blades are made from fine-grained, nicely tempered chrome-manganese steel and hardened to 59 HRc. The blades take and hold an excellent edge. The blades are precision ground. The blades are ground at a 25 degree bevel. The blade width tapers .030" from tip to shoulder for sidewall clearance. The blade thickness tapers from 3/8" at the tip to 1/2" at the shoulder. Handles are stained Beech and have 2 steel ferrules to withstand heavy plows from a mallet. The blades have a well-seated heavy steel tang. Blade Length: 149mm (5-7/8") Handle Length: 155mm (6-1/8") Handle Diameter: 46mm (1-1/2") Total Length: 304mm (12”) Set includes the following chisels: Item # Blade Width 811206 6mm 811210 10mm 811212 12mm WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov