Milwaukee k540 sds max hammer drill has roto stop and a chisel function facility, built in safety clutch for extra user safety, machine has good low vibration at only 16m/s. is a 2 mode function and has a powerful 7.5 joules blow rate. Max drilling: 40mm into concrete, 65mm tunnel bit and 105mm core bit. Register the machine online with Milwaukee to extend the warranty to 3 years it comes with 1 year warranty as standard. Register online within 28 of purchase for extended 3 year warranty Milwaukee SDS max hammer drill. For drilling and breaking. 1100 watt motor. 7.5 joules. 40mm in concrete. 6.3kg weight.