The Bosch GBH 18V-21 cordless rotary hammer provides lasting performance with its highly efficient brushless motor. Maintenance free, these motors offer greatly increased tool life, along with greatly extended runtimes on a given battery charge. The GBH 18V-21 delivers 2.0 Joules of impact energy allowing an impressive, maximum drilling diameter of 21mm in concrete. The three function selector gives a choice of rotary drilling in wood or metal, hammer drilling in masonry and concrete or hammer only for chiseling. It has an LED worklight, improving visibility around the drill bit. The Rotation Control Clutch protects the user should the drill bit jam. Variable speed gives you control especially when starting to drill a hole. When chiselling the Vario-Lock allows you to position the chisel at the most convenient angle of attack. This is a body only tool; you can utilise batteries from any other Bosch 18V Li-ion tool. Bosch Li-Ion battery technology is premium quality and provides the longest possible battery life and runtime. Supplied without batteries or Charger includes L-Boxx.