Bosch 2608596816 HSS-G Metal Drill Bits Long Series 4mm, Pack of 5

Suitable for the following metals: Aluminium Aluminium Alloy Copper Platinum Silver Gold Titanium Zinc Alloys Chrome Tin Aluminium Profile Steel/Ferrous Metal Unalloyed/Low-Alloy Steel High-Alloy Steel and Gray Iron. The Bosch 2608596816 Pack Of 5 have a 4.0mm diameter a working depth of 78mm and an overall length of 119mm. The HSS Twist Drill Bit Ground is for drilling through metal with maximum precision. The bit's exposed 135-degree self-centring split-point tip combines active cutting and perfect centring without wandering delivering maximum precision. The split-point tip also eliminates any need to pre-punch or pilot drill for up to 10 mm. This precision-ground bit made of HSS (high-speed steel) enables up to 40% faster drilling rate and up to 50% lower feed pressure than standard-ground HSS drill bits with chisel edges. This bit is designed for drilling holes in alloyed and non-alloyed steel cast steel cast iron sintered iron malleable cast iron non-ferrous metals and hard plasti