Holds up to three times longer than standard drills. Drilling through reinforced concrete is a challenging task that puts a lot of strain on the drills. Standard drills with two cutting edges tend to get stuck in the reinforcement and break. 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 during hammer drilling. Thanks to Bosch Carbide Technology and the full carbide head, the Expert SDS plus-7X lasts significantly longer than regular hammer drills. It effectively penetrates the reinforcement, so you don’t have to stop, re-aim, or change the drill when you hit steel. Ideal 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 unmatched performance, reliability, and durability. It is the expert accessory for SDS plus rotary hammers. Suitable for all SDS plus rotary hammers. Diameter (D) mm: 8.00, Working length (L1) mm: 100, Total length (L2) mm: 165.