3pcs HSS Titanium Coated Step Drill Bit 4-12 4-20 4-32 Drilling Power Tools

Material: High-speed steel 4241 (suitable for work pieces with hardness below 25 degrees, such as carbon steel)
Specifications:
4-32 mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mm) 6.35 mm handle
4-20 mm (4, 6, 8, 10, 12, 14, 16, 18, 20 mm) 6.35 mm handle
4-12 mm (4, 5, 6, 7, 8, 9, 10, 11, 12) 6.35 mm handle

Cutting materials: thin iron plate, aluminum, insulating board, PVC board wood thickness within 5 mm. Holes of various specifications can be drilled with one bit.
set of 4 pcs aluminium box high speed steel spiral groove step drill directly sold by the manufacturer

Product Description