Holds up to three times longer than standard drill bits. Drilling through reinforced concrete is a challenging task that puts a lot of strain on drill bits. Standard drill bits with two cutting edges often get stuck in the rebar 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 doesn't jam and shows no weakness when hammer drilling. Thanks to Bosch Carbide Technology and the full carbide head, the Expert SDS plus-7X lasts significantly longer than regular hammer drill bits. It effectively penetrates rebar, so you don't have to stop, re-aim, or change the bit when you encounter steel. Ideal for construction professionals who regularly drill into concrete and reinforced concrete, such as for drilling and installations. The Bosch Expert SDS plus-7X hammer drill bit offers unmatched performance, reliability, and durability. It is the expert accessory for SDS plus rotary hammers. Compatible with all SDS plus rotary hammers. Diameter (D) mm: 17.00, working length (L1) mm: 250, total length (L2) mm: 315.