Meco Doersupp 4-22mm Hex Shank Step Cone Drill Bit Hss Titanium Coated Hole Cutter

Description: Doersupp 4-22mm Hex Shank Step Cone Drill Bit HSS Titanium Coated Hole Cutter Specification: Material High speed steel 4241 Size 4-22 mm (10 Setps: 6,8,10,12,14,16,18,20 22mm) Shank 6mm(dia),25mm(L) Total 75mm(L) Features: The ladder of its unique structure, a bit can open a variety of specifications of aperture. Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken. Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,but it is possible. The use of tools: drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit, recommend drilling rate of 250-250 RPM. Package Included: 1 x Step Drill More Details: