The dewalt d25501k compact 2 mode sds max combination hammer drill boasts an excellent power to weight ratio of 11 joules of impact energy delivered by a 61kg hammer rotation stop for medium light demolition applications and has a unique dust sealing protection to prevent even the finest dust ingress into the hammer mechanism delivering high durability and extended tool life the hammer mechanism is optimised by reducing the number of components and by improving dampening to deliver maximum impac