The ladder of its unique structure, a bit can open a variety of specifications of aperture.
Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.
Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,but it is possible.
The use of tools:drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit.
Surface treatment:titanium
Shank:1/4 Hexagonal
Size:3-12mm(11 steps:3,4,5,6,7,8,9,10,11,12mm)
Tools:pistol drill, bench drill.
Use:Metal Drilling
Type:Core Drill Bit
Colour:Gold
Material:Metal
Size:75mm length
Package Contents:
1 * Step drill
