3pcs HSS Steel Titanium Coated Step Cone Drill Bit Set Hole Cutter 4-12/20/32mm

Feature

100% brand new. Ideal for using to cut holes in a variety of materials Including steel,brass,wood,plastic,etc. Set of 3 for jobs of all sizes. 2 fluted edges for faster, smoother cutting. 3 sided shanks prevent slippage when in chuck. Made from high quality HSS steel, strong and durable. Surface treatment: titanium p
Hex Diameter: 1/4"(6.35mm). Advice: Use cooling water while working, which can effectively extend the service life of the drill bit. 250-400 r/min of drilling rate is recommended. Pacakge includes: 3pcs HSS Drill Bit Set
Item shipped from China,needs 20-30 days delivery
Material: HSS 4241. The 3 cutters come in the following sizes increments of 2mm: 4-12mm4681012mm): total length: approx. 68mm(2.68"), step length: approx. 43mm(1.69"). 4-20mm468101214161820mm): total length: approx.75mm(2.95"), step length: approx. 50mm(1.97"). 4-32mm468101214161820222426283032mm),step length: approx. 103mm(4.06"), step length: approx. 89mm(3.50").