BOSCH 25-piece HSS-G ProBox set 135 degrees 1-13 mm. 2608587017

The ground HSS twist drill bit drills in metal with maximum precision. The self-centring drill point with cross-grinding and a point angle of 135 degrees enables perfect centring without wandering. The cross-ground drill point eliminates the need for center-punching or pre-drilling up to 10 mm in diameter. This precision-ground HSS steel drill bit drills 40 % faster and requires 50 % less contact pressure than conventionally ground HSS drill bits. It is suitable for drilling holes in alloyed and unalloyed steel, cast steel, cast iron, sintered iron, malleable cast iron, non-ferrous metals and hard plastic. The ground HSS twist drill is manufactured in accordance with DIN 338. It belongs to drill type N (small side chip angle) with a drill point of 135 degrees and diameter tolerance h8.