GMC SDS-Plus Hammer Drill (950W) - 920378 Powerful 950W, 2.3 Joule motor with 4-function selector: pneumatic hammer action for highly efficient drilling into brick and masonry; fixed and free chuck chisel actions; and rotation only for general drilling into metal and wood. Magnesium construction provides strength, durability and lightness in weight. Variable speed for control and accuracy. Rubber grip and power lock-on for comfort in use.