The dewalt dch274p2 brushless xr 3 mode hammer is supplied with a quick release sds plus tool holder and keyless chuck for easy switching between hammerrotary hammer and rotary only applications it has a category leading high speed drilling performance at more than 90 holes 10 x 80mm per charge with a rotation stop mode for light chiseling in plaster tiles and render and impact stop mode for rotary only drilling in wood and metal the brushless motor and high capacity xr 18 volt 50ah lithium ion