This high-quality, SDS-max®, 9 In. tamper plate spade works with the HS1828 tamper plate and the HS1969 carbide bushing tool. All Bosch chisels are manufactured with a proprietary heat-treat process. Bosch offers a full assortment of SDS-max® hammer steel points and chisels. Bosch brings constant innovation to concrete and masonry drilling with increased effeciency and higher durability.