Step Drill Bit Set Metal Plate Hole Drilling Cone Bit with Hex Shank Center Punch 4PCS HSS Step Drill Bit Set

Description

This step cone drill bit set is made of high-speed steel to reduce friction and run cooler. Covering assorted step sizes helps to drill or enlarge different holes in one bit. The drilling angle of the drill bit keeps the hole smooth and requires minimal deburring. Can be applied in Aluminum plates, insulation boards, and PVC boards. The thickness of the wood is within 5mm.

Features
Step drill bit
-Color: Golden.
-Material: Steel.
-Size:
0.4-3.2 cm/0.16-1.26 inch.
0.4x2 cm/0.16x0.79 inch.
0.4x1.2 cm/0.16x0.47 inch.
Specification:
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, 5, 6, 7, 8, 9, 10, 11, 12mm)
Hardness: HRC58-65

Package Including
3 * Step drill bit
1 * Center punch