Precise cutting of channels in bricks. The concave design allows for accurate channel cutting. When you are installing pipes or cables in a wall, you need to chisel clean, precise channels. The PRO SDS max Hollow Gouging Chisel is a reliable and precise accessory designed for this purpose. It is intended for electricians, plumbers, and HVAC technicians who need to cut clean channels in brick and concrete walls. Thanks to the chisel's concave design, channels can be cut accurately and easily. The chisel can be used with your SDS plus hammer.