Professional HSS drills for commercial or occasional use HSS metric drills 4.2mm metric drills 10 x 4.2mm metric HSS drills Suitable for drilling holes in steel, cast iron, wood, plastics and other non ferrous metals Perfect for model making and small miniature work Half ground drill bits Manufactured from 4241 high speed steel for strength and durability Comes in a plastic tube for easy storage and transportation and to prevent the drills from getting lost as well as for easy identification SPECIFICATIONS • HSS Metric drills • 4.2mm drill bits • For drilling steel, wood, plastics etc... • Total length of the drills – 75mm • Comes in a plastic container • Pack size – 10 pack