These are heavy-duty, forged-alloy steel replacement chisel bits engineered for high-impact demolition work using 30mm HEX shank jackhammers and demolition breakers. The set consists of one Bull Point Chisel (designed for targeted fracturing, piercing, and breaking heavy concrete/stone) and one Flat Cold Chisel (designed for channel cutting, scaling, and edging masonry surfaces). Both bits come with protective twist-lock plastic storage tubes.