Quick Change Removable Chuck for drilling in wood, steel, ceramic and screwdriving applications Large hammer mechanism delivers high performance with low stress to the critical components resulting in better durability Mechanical clutch eliminates sudden high-torque reaction should the bit jam Electronic variable speed for total control in any application Output air slots designed to protect users Items Included: Multi position rubber side handle# Depth stop# Heavy duty carrying case# ?Quick Change? 13mm keyless chuck