Faithfull Metric HSS Drill Bits are quality roll forged flute twist drills with a black oxide coating, manufactured from HSS in accordance with DIN338 standard. Suitable for use in alloy steels, carbon steels and hardened alloy steel. A cutting lubricant is recommended. Although designed for cutting metal, they are also suitable for drilling holes in plastic, timber, chipboard and plywood. Supplied in a robust plastic case that secures and protects the drills. The contents can easily be viewed through the flip action transparent lid.This Faithfull 13 Piece HSS Jobber Drill Bit Set contains commonly used sizes from the metric range. Sizes: 1.5, 2, 2.5, 3, 3.2, 3.5, 4, 4.2, 4.5, 5, 5.5, 6 and 6.5mm