3 Review(s)

3pc 1/4" Hex shank Titanium Coated HSS Steel Step Drill Bit 3Pcs HSS Steel Step Cone Titanium Drill Bit Tool Set Hole Cutter 4mm-12/20/32mm. Titanium Nitride Coating for Cooler Running, can effectively extend the service life of the drill. Material:HSS 4241(Suit for use in hardness under 25 degree artifacts,The plate thickness under 5 mm) Type: 4-32mm:4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm 4-20mm?4,6,8,10,12,14,16,18,20mm) 4-12mm?4,6,8,10,12mm) Length: 4-12mm length: About 6cm 4-20mm length: About 7.2cm 4-32mm length: About 9.7cm