Atoplee 1pc 13mm Shank HSS 4241 Spiral Groove Step Drill Bit 6-60mm

Features:

100% brand new and high quality.
Unique ladder structure , it can open multiple aperture.
it can not easily be broken.
It can deburr, chamfer and open hole, but ordinary twist drill can't.
Little rock, it can carve out a nice aperture without firstly using a center punch.
Tool using: pistol drill, bench drill. Water to make ti cool while working, it can effectively extend the service life. Recommended drilling speed 250--400 rpm.
Suit for use in hardness under 25° artifacts,The plate thickness under 5mm.

Package Included:

1pc HSS 4241 spiral groove step drill