Bosch 2608585888 HSS-Co Drill Bits for Metal 5.5mm (Pack Of 10) The Bosch 2608585888 has a 5.5mm diameter, a working depth of 57mm and an overall length of 93mm. The HSS Twist Drill Bit Cobalt provides long-lasting performance when drilling stainless steel. This extended lifetime results from a cobalt alloy content of 5% and fully ground HSS (high-speed steel), which provides excellent surface quality, wear-resistance and heat protection. Equipped with two cutters and two flutes, chips are removed quickly to make the bit last even longer. This drill bit works with alloyed and non-alloyed steel, stainless steel, cast iron, cast steel and acid- and heat-resistant steels. This drill bit works with alloyed and non-alloyed steel, stainless steel, cast iron, cast steel and acid- and heat-resistant steels. It has a cylindrical shank system (shank equal to drill bit diameter) and is intended for use in drill stands and drill drivers. The HSS Twist Drill Bit Cobalt is manufactured to DIN 338. The drill bit is Type N (flute angle) with a 135-degree tip and a diameter tolerance of h8. Active cutting and perfect centring without wandering are achieved by the pointed split-point tip. Suitable for the following materials: Steel/Ferrous Metal, Stainless Steel/Inox, Alloyed/Non-Alloyed Steel, Gray Iron and Hard Plastic. Features: Cobalt alloy and fully ground HSS provide wear resistance and heat protection Two cutters and two flutes remove chips quickly to make the bits last even longer HSS Twist Drill Bit Cobalt provides long-lasting performance when drilling stainless steel Manufactured to DIN 338, drill bit Type N (flute angle) with a 135-degree tip, diameter tolerance h8 Specification: Pack Qty: 10 Diameter: 5.5mm Total length: 93mm Working length: 57mm