... .high quality 2.high speed steel The picture above is Hss Streight Shank Twist Drill Material: HSS4341,HSS9341,M2(6542), Point angle: 118degree,135 ... ,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 wood boring ...