1-13mm HSS Cobalt Jobber Twist Drill Bits Set for Stainless Steel Hard Metal 5x (25 Piece Set) SPECIFICATION: Product Name: HSS Cobalt Jobber Twist Drill Bits Type : Drill Bit Material : M35 high speed steel Manufactured: DIN338 Size:1-13mm FEATURES: Fully ground from solid material M35 alloyed HSS steel with 5% Cobalt content High heat resistance Manufactured to DIN338 Dimensionally precise 135° split point from 3mm and above eradicates the need to pre-drill or centre punch. Prevents walking and enables faster penetration Uses: Suitable for drilling thick cast iron, tainless steel, aluminum alloy, non-standard metal, wooden plate, etc. Set Of 25 Cobalt Jobber Drills Supplied In A Metal Case For Storage Includes 1 of each of the following sizes - 1mm 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm 5.5mm 6mm 6.5mm 7mm 7.5mm 8mm 8.5mm 9mm 9.5mm 10mm 10.5mm 11mm 11.5mm 12mm 12.5mm 13mm Package included: 5x 25 Piece Set Cobalt Jobber Twist Drill Bits