The black decker kd860ka sds 3 mode hammer drill has been designed for fast efficient penetration of brick block stone and concrete produces 16 joule of impact energy allowing the user to drill into hard materials such as concrete and granite in non hammer mode it is capable of drilling up to 13mm holes into steel and 30mm holes into wood it is fitted with a non slip sds plus chuck for quick accessory changing and a secondary handle to provide additional control the drill offers variable speed