The REX Steelmaster HSS-Cobalt with amber finish is a cobalt drill bit grinded from one piece. The drill bit has a grinded spiral, a 135º top angle and is equipped with a split point. This gives you more grip when starting and the drill bit does not run away on the material. HSS metal drill bits are made from high-quality alloyed high-speed steel with 5% cobalt. This gives these drill bits a longer service life. The REX Steelmaster HSS-Cobalt is the ideal choice for drilling in very hard materials such as stainless steel, but you can also benefit from the improved properties with softer metals. These drill bits are less suitable for drilling in wood or plastics.