TOOL WORTH HSS STEP DRILL 4-20 TIN COATED

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,

Specification:

Size: 4-20mm
Allow 1-3mm measurement error.
Material: High speed steel
1X Hex Titanium Step Drill.

TOOL WORTH HSS STEP DRILL 4-20 TIN COATED