Bosch GBH8-45D SDS-MAX Rotary Hammer Drill uses the 1500w motor at it\'s heart gives the trade superb durability and top performance during drilling and chiselling applications. This Bosch Hammer Drill uses an automatic switch lock for the best convenience in continuous chiselling applications plus the safety overload clutch protects the user and the machine. The GBH8-45D has an easily adjusted speed controller allowing total optimised adjustment to suit most applications and a soft start feature gives clean safe starts. Drilling diameter in concrete with hammer drill bits 12mm to 45mm. Optimum range of applications in concrete with hammer drill bits 20mm to 40mm. Drilling diameter in concrete with breakthrough drill bits 80mm. Drilling diameter in concrete with core cutters 125mm.