Durable mortar removal! Wide cutting edge for higher material removal rate. 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 SDS plus-4C to help you get the job done reliably. The PRO SDS plus-4C is a durable flat chisel for demolition and renovation work. It features a wide cutting edge 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.