The Bosch 2607019929 SDS Plus-5 Hammer Drill Bit Robust Line Set contains five exceptional drill bits to enable smooth and effortless drilling in masonry and concrete. The carbide plate includes grooves and notches which penetrate material with ease and reduce the risk of jamming in concrete. The Activeteq centring tip provides drill guidance without jarring or wandering. In addition vibrations are reduced and user strain is minimised thanks to AWB brazing and hardening technology. These bits can be used with rotary hammers with SDS plus holders and are ideal for trade and DIY users.