Made of fine quality material, low resistance, high hardness, improving work efficiency.
The design of triangle shank makes the clamping tighter and does not slip.
U-shaped spiral is smooth and flat, and the drilling is smoother.
Strong toughness and wear resistance, can be installed in electric drills.
Provides smooth and accurate drilling in tile, glass, brick wall, wood and so on.
Material: Hard Alloy
Tool Holder Type: Triangle Handle
Cooling Type: Outer Cold
Blade Top Corner: 135°
Category: Hole expansion drill
5pcs: 4mm, 5mm, 6mm, 8mm, 10mm
7pcs: 3mm, 4mm, 5mm,6mm, 8mm,10mm,12mm