Specification:
Material: HSS 4241.
Size: 4-39 mm.
Product features:
1. With unique ladder structure, it can open several holes.
2. Compared with ordinary twist drill, it can also mill, lower.
3. With no driver, you can open a beautiful hole.
4. Suitable for pistol drills, table drills.
Note:
1. During the work of the step drill pour water, the service life can be effectively extended.
2.The rotation speed of drilling is recommended 250-400rpm.
3. Suitable for use in hardness under 25° artifacts, the plate thickness under 5 mm.
Box contents:
1 x step drill.