HSS Twist drill Bits we manufature are made from HSS with good heat treatment and surface treatment. Main technical conditions of twist drill. Manufacturing process: Rolled, milled or fully ground. Point angle: 118?or 135?Finish: Black oxide, bright, or Ti-plated Diameter: 0.2-100mmShank: Straight shank, taper shank, hex shank, reduced shank Material: M2, M7, M35, M42, W9Mo3Cr4V, W4Mo3Cr4V
