"SHUR-LINE" PUTTY KNIFE Size : 4"Utility Knives Low cost plastic putty knife Manufactured with flexible polystyrene Tapered blade & chisel edge. This knife has good flex, a sharp edge, and a rounded comfortable handle. Great for use with crack filler, dry wall, stucco patch, caulk, concrete patch, adhesives, furniture refinishing. Won"t scratch or gouge surfaces.Easily to clean.