The Bosch Bulldog Xtreme Max SDS-Plus Rotary Hammer is billed as a step up from Bosch's widely used Bulldog Xtreme model. Like it's predecessor, the 8-amp Max offers rotary hammer, hammer-only, and rotary-only options; and a built-in clutch, along with many other features that make drilling and chipping concrete faster and more efficient than with ordinary hammer drills. What sets the Max apart from its older brother is a built-in "shock absorber," which makes it more comfortable to use and less likely to induce repetitive-stress injuries.
The bits that fit these tools have identical slotted shanks; to install one, you align the shank so it enters the chuck and push until you hear a click.
On some rotary hammers, you have to loosen the side handle to adjust the depth stop — but the Xtreme Max has a convenient release button. The tool features rotary-only, rotary-hammer, and hammer-only modes.