Material: High-speed steel ; Package included: 100 pcs ; Diameter and total length: 1 mm twisted position, 1.5 mm twisted position, 2 mm twisted position, 2.5 mm twisted position, 3 mm twisted position
This model is a plated twist drill set, the 1-2.5mm size is made of high-speed steel, and the 3mm size is made of high-carbon steel
It is very suitable for drilling and reaming aluminum alloy, wood, jade, diamond, bodhi, but not for stainless steel board
Straight shank design is more suitable for many electric drills and drill machine (not included)
Sharp and twisted flutes will make drilling easier