A chisel is a TOOL used for cutting and shaping wood, metal, or stone. It typically has a metal blade with a sharp edge at one end and a handle at the other. The term 'TOOL' is an appropriate four-letter solution for this crossword clue. An EDGER is a five-letter TOOL used to trim grass and create clean edges along sidewalks and driveways. Finally, an EDGETOOL is an eight-letter TOOL that combines the features of both a chisel and an edger. It is used to cut and shape wood, metal, or stone, as well as to trim grass and create clean edges.