... Tin-coated, hard efficient durable and safe. Hss twist drill bit setN.W/G.W: 24/25 KgsMEAS: 41×33× ... 8, 9/64, 5/32, 11/64, 3/64, 13/64, 7/32, 15/64, 1/4.Eagle Tools has ... ten yeas history of manufacturing the high-speed steel twist drill. We are specialized in producing 4241, 4341, 9341, ... technical force and advanced testing method. Hss twist drill bit sethss drill setdrill set Hss twist drill bit set