Holds up to 3 times longer than standard drill bits. Drilling through reinforced concrete is a challenging task that demands a lot from the drill bits. Standard drill bits with two cutting edges tend to 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 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 drill bits. It effectively penetrates the 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. Suitable for all SDS plus rotary hammers. Diameter mm: 5.0; 6.0; 6.0; 8.0; 10.0; Working length mm: 50; 50; 100; 100; 100; Total length mm: 115; 115; 165; 165; 165.