Universal Metal Drill Bit Set comes with 10 pieces and can be used with metal, plastic and wood Metal Drill Bit Set includes 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 8 mm and 10 mm bits Drill bit set has roll forged high speed steel with polished finish for accurate drilling 135 degree split point blade tip type