1/4" to 3/4" Titanium Step Drill Bit Unibit High Speed 9 Different Sizes
3pc 4-12/20/30mm
Features:


100% brand new and high quality.
It is Inch step drill bit.
Titanium coated to lower friction and running temperature, prolong its lifetime.
Applicable for drilling those workpieces that hardness is less than 25HR and thickness is beyond 5mm, such as carbon steel plate, sheet iron, insulation board, etc.
Full manufactured with CBN grinding, made from high speed steel, high machining precision requirement.
Note:It is not suitable for drilling stainless steel.

Specifications:
 
Material: high speed steel 4241
Shank shape: Triangle Shank
Surface treatment: Titanium coated
Step quantity(steps) : 9 steps
Step diameter: 1/4(6.35mm)，5/16(7.94mm)，3/8(9.53mm), 7/16(11.11mm), 1/2(12.7mm), 9/16(14.29mm),5/8(15.88mm), 11/16(17.46mm), 3/4(19.05mm)
 
Package Included:
 
1pc Step Drill Inch Titanium Bit
 
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