OCGIG 6 PCS 1/4" Hex Shank Combination Drill Tap Bit Spiral Screw Drilling Set Countersink Bits;

Specification:
Material: High-speed steel(HSS 4341)
Color: Silver
Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5
Shank: 1/4" (6.35mm) hex shank
Size:M3, M4, M5, M6, M8, M10
Usage: Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc.

Description :
1.High hardness, rustproof, solid and durable.
2.The advantage is opening, tapping, chamfering.
3.Self-centering point, do not need assistant center drilling or center punching.
4.Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency.

Features :
1. Save processing steps and time costs, improve efficiency
2. Spiral groove, within the processing thread, cutting up to exclude, and was curled applied internally threaded through holes
3. Wear and long life

Package include:
6 x Compound Tap Drill Bits