... component. 1.high quality 2.high speed steel Hss Streight Shank Twist Drill is used to process the hole of steel ... 2.high speed steel The picture above is Hss Streight Shank Twist DrillProduct Description:We produce all kinds of HSS twist ... oxide,tin oxide,black flute&bright shank,rainbow etc.6. Shank: Straight shank drills, Taper shank drills, 1/2 shank drills,Wood working drill bits, Flat ...