Black Decker 13mm Hammer Drill

Hand-drilling hammers are used to drill steel into rock or to drive wedge and feathers into cracks or drilled holes. There are two types of hand-drilling hammers—single jacks and double jacks. Both have two rounded striking faces with beveled edges to minimize chipping.A hammer drill combines a hammering action along with a strong rotational torque. This makes it an excellent choice for tough projects that involve concrete or masonry. Unlike an impact driver, you can turn its hammering feature off and use it as a regular drill.