Makita is the leading manufacturer of professional power tools on the market. The HR166DZ cordless SDS-plus rotary hammer is powered by 10.8V or 12V li-ion slide Type battery (not included), with variable speed control by trigger and constant speed control to deliver up to 680 rpm, 4, 800 ipm and 1.1 Joules of impact energy for a wide range of applications. The HR166DZ has 2 mode operation, rotary only and rotary hammer. The rotary hammer is capable of driving up to 16mm maximum in concrete, 10mm maximum in steel and 13mm maximum in wood. 1 year manufacturer warranty with a further 2 years when registered within 30 days of purchase. This guarantee does not apply where non-genuine or recommended parts or accessories are fitted to the tools).