A chisel is a tool with a characteristically shaped cutting edge of blade on its end; for carving or cutting a hard material such as wood, stone, or metal by hand, struck with a mallet, or mechanical power. The handle and blade of some types of chisel are made of metal or wood with a sharp edge in it (such that wood chisels have lent part of their name to a particular grind).
Chiselling use involves forcing the blade into some material to cut it. The driving force may be applied by pushing by hand, or by using a mallet or hammer. In industrial use, a hydraulic ram or falling weight ('trip hammer') may be used to drive a chisel into the material.
A gouge is a type of chisel that serves to carve small pieces from the material; particularly in woodworking, woodturning and sculpture. Gouges most frequently produce concave surfaces and have a U-shaped cross-section.
Chisel comes from the Old French cisel, modern ciseau, Late Latin cisellum, a cutting tool, from caeder