Lasts up to 3 times longer than standard drills - Drilling through reinforced concrete is a difficult task that demands a lot from the drills. Normal drills with two cutting edges get stuck in the reinforcement and break off. The full carbide head on the Expert SDS plus-7X is an advanced 4-cutter made from a single piece of the hardest metal: it does not jam and shows no weakness when impact drilling. Thanks to Bosch Carbide Technology and the full carbide head, the Expert SDS plus-7X lasts far longer than normal hammer drills. It effectively penetrates reinforcement so you don't have to stop, re-aim or change drill bits when you hit steel. For construction professionals who regularly drill into concrete and reinforced concrete, for example for drilling and installations. The Bosch Expert SDS plus-7X hammer drill offers unparalleled performance, reliability and durability. It is THE expert accessory for SDS plus hammer drills. Suitable for all SDS plus hammer drills. Diameter (D) mm: 3.50, Working length (L1) mm: 50, Total length (L2) mm: 115