hss twist drill we provide various kinds of drills fine quality competitive price hss twist drill1.Material:HSS M42,M35,6542(M2), ... ,Black flute & bright shank3.manufactory process:roll forged,edge ground,fully ground4.Standard:DIN 338 (jobber series) DIN 340 ... HSS straight shank twist drills,taper shank drill,SDS drill bits,center drills,step drills,masonry drill,,wood working drill,flat wood bit ...