3Pcs 3-12mm/4-12mm/4-20mm, Step Drill Bit HSS Straight Groove Step Drill Bit Titanium Coated Wood Metal Hole Cutter Core Cone Drilling Tools Set
Product Details:
HSS Power Drills
Material: HSS
Automatically Deburrs Holes as you Drill
HIgh Speed Steel for Long Life
4-12mm: 4, 6, 8, 10, 12mm
4-20mm: 4, 6, 8, 10, 12, 14, 16, 18, 20mm
3-12mm: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm
4241 High-Speed Steel HSS (Suitable For Use In The Workpieces Whose Hardness Is 25 Degrees Such As Carbon Steel, Plate, Insulation Board, and Wood Board)