Bosch 3/4" x 10" SDS Plus Hammer Steel Chisel is a professional-grade tool designed for chiseling or breaking brick, concrete, and loose stone. It is made of HRC 50 grade steel, heat treated, and evenly tempered for maximum durability and performance. The chisel is suitable for use with the Bosch SDS Plus Rotary Hammer. Bosch offers a full assortment of SDS-plus hammer steel points and chisels, each designed for a specific application.