Long lifespan for chiseling concrete! Self-sharpening blade for long-term performance. Are you an interior renovator in need of a durable chisel to remove mortar and plaster from walls and floors? We have developed the PRO HEX 22-5C to help you get the job done reliably. The PRO HEX 22-5C is a durable flat chisel designed for demolition and renovation work. It features a self-sharpening chisel body for longevity. Use it with your SDS hammer drill when you need to remove plaster, mortar, gypsum, and concrete residues from floors or concrete and brick walls.