Narex 6 pc set 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm Mortise Chisels 811204-811212 Made by a small tool manufacturer in the Czech Republic Blades are made from fine-grained, nicely tempered chrome-manganese steel and hardened to Rc 59 Contains the following sizes: 4mm, 5mm, 6 mm, 8 mm, 10 mm and 12 mm Bevel ground at a 25 degree bevel. Handles are made from stained Beechwood