HSS Step Drill Bit

Features:
1. Unique step structure: One drill bit can open a variety of sizes and sizes, and one step drills to a box of drill bits.
2. No need to use the center punch, it is not easy to break compared with ordinary twist drill. On-site construction, a variety of specifications for a step drill.
3. It is possible to deburr, chamfer, open elliptical hole expansion, and the function that the twist drill cannot be completed.
4. Compared with ordinary twist drills. Shaking is small, and you don't need to lead the center punch to open a beautiful aperture.
5. Use tools: pistol drill, bench drill. When the water is cooled while working, it can effectively extend the service life of the drill bit. 

Descriptions:
1. Lightweight and easy to use, it can effectively extend the service life of the drill bit. The recommended drilling speed is 250-400 rpm.

Specifications:
Material: HSS 4241
Color: Gold
Type: 4-12mm, 4-20mm, 4-32mm