Material: 1-2.5 mm size is high-speed steel,
3 mm size is high-carbon steel.
Surface treatment: titanium plating
Dimensions: diameter and total length:
Diameter 1.0 mm, length is 32 mm x 10 off
Diameter 1.5 mm, length is 40 mm x 10 off
Diameter 2.0 mm, length is 48 mm x 10 off
Diameter 2.5 mm, length is 54 mm x 10 off
Diameter 3.0 mm, length is 60 mm x 10 off
It is very suitable for drilling and reaming aluminum alloy, wood, jade, diamond, bodhi, pvc board.
Note: it can not be used for too hard metal, not for stainless steel board.