The Bosch DH507 SDS-max demolition hammer weighs only 12.4 lbs., making it an ideal hammer for hard-to-reach applications. This 10a tool that gets the job done, delivering 5.6 ft.-lbs. of impact energy and a max of 2800 bpm. It has Vario-Lock positioning, which allows for rotating and locking the chisel with precision The SDS-Max chuck system provides tool-free bit changes. And the demo hammer has a 360 degree rotating auxiliary handle for better grip positioning and an ergonomic grip area, for better comfort when chiselling in a wide variety of positions.