Made from high-strength heavy-duty carbide, this bushing head combines with a tamper plate shank for tough hammer steel. It works with a variety of hammer shank systems SDS-max, spline/round hex and 3/4 inch hex. All Bosch chisels are manufactured with a proprietary heat-treat process. Bosch offers a full assortment of hammer steel points and chisels. Bosch brings constant innovation to concrete and masonry drilling with increased effeciency and higher durability.