Lasts up to 3x longer than a standard drill bit.\t Extremely durable drill bit tip with Bosch Carbide Technology.\t Punch through reinforced concrete with a 4-cutter Full Carbide Head.\t Fits all SDS plus rotary hammer drills.\t Ideal for drilling holes in hard stone, concrete, reinforced concrete.\t Diameter mm: 5.0; 6.0; 8.0; 6.0; 8.0; 10.0; 12.0 Total length mm: 115; 115; 115; 165; 165; 165; 165