The Bosch 11241EVS 1-9/16 inch SDS-Max combination hammer is a powerful 14-pound tool that is well balanced and easy to wield for long, continuous hours of use. The locking trigger is large and it engages locks and unlocks easily - a boon, since you don't have to squeeze the trigger and hold the tool during extended use.This Bosch tool is excellent with 20% more power in hammer-only mode for concrete and mortar breakthrough work like pounding through a block, stucco or stonewalls. The hinged, vibration-dampening handle proves real useful during such heavy-duty tasks. The hammer has a dual-mode selector that lets you hammer with or without rotation to tackle jobs that need versatile actions. The rotating bit holder in this combination hammer also acts as a rotary hammer makes chipping close to a wall or in a corner easy.The Constant Response Circuitry provides soft-start, maintains the speed level under load, and thereby provides overload protection. Finally, an 11-amp motor with variable speed, and an Auto-Max variable-speed dial make this power tool deliver maximum performance with speed and power.