Suitable for making clean accurate holes in gaskets / leather (for belts) / soft plastic / rubber / vinyl and other soft materials. Manufactured from heat treated high carbon steel. Knurled body for a secure grip. Precision ground flutes and cutting edges. Really sharp point ideal for cutting effectively with minimal effort. Includes; 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 11mm, 12mm, 14mm, 16mm & 19mm.