Dewalt d25721k sds max combination hammer 7kg 1350w 110 240v dewalt d25721k gb p this 240v combination hammer from dewalt is a superb addition to any tradesman s toolbox designed to drill anchor fix and through holes in concrete and masonry from 12 to 48mm in diameter plus core drilling up to 115mm features an active vibration control system that incorporates a floating handle and delivers extremely low vibration p p manufactured with an ergonomic compact and slim line design tha