... , heat treated; Tin-coated, hard efficient durable and safe. Hss twist drill bit setN.W/G.W: 24/25 KgsMEAS: 41×33 ... ×32.5 CMSPECIFICATION(mm):1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11 ... /64, 3/64, 13/64, 7/32, 15/64, 1/4.Eagle ... ten yeas history of manufacturing the high-speed steel twist drill. We are specialized in producing 4241, 4341, 9341, 6542, M35, M42 high ...