The dewalt dck253885 twin pack contains the following 1 x 18 volt dch253 3 mode sds hammer drill that is ideal for drilling anchors and fixing holes into concrete brick and masonry from 4mm to 24mm the hammer drill has a rotation stop mode for light chiselling in plaster tiles and render and an impact stop mode for rotary only drilling in wood and metal it uses 40ah 18 volt lithium ion batteries to deliver high performance long life and maximum runtime no load speed 0 1200min impact rate 0 4500m