Double Jack Hammer Check Availability

Hand-drilling hammers are used to crush and break rock, 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. This large driving sledge has a 36-inch handle and 8-pound head. Because their use requires considerable expertise from both the driller and holder, we recommend that you use single jacking or modified double jacking until safety and proficiency with the double jack can be assured. NOT RECOMMENDED FOR USE BY VOLUNTEERS WITHOUT STRICT SUPERVISION AND SAFETY EQUIPMENT (HARD HAT, GLOVES, EYE PROTECTION).