This Erbauer metal drill bit set comes with 25 pieces and can be used with metal, plastic and wood Erbauer Metal Drill Bit Set includes 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.2mm, 4.5mm, 5mm, 5.2mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 11mm, 12mm and 13mm bits Fully ground high speed steel drill bit with 135 deg split point for precision drilling