The SDS Plus Scutch Comb Chisel is the perfect choice for general electricians preparation work in masonry. · · · The hammer action chisel is purpose designed for masonry dressing, levelling uneven masonry surfaces and forming channels / back box holes etc. · · Use in general concrete, soft bricks, lightweight mortar, limestone, constructional granite, natural stone, hard bricks and heavy duty concrete. · · Designed to work with 40mm Combs which are available from Armeg in single or five packs.