The flat chisel, like the point and tooth chisels,
It consists of a shaft, 15-25 cm long and 1-2 cm in diameter, with a flat and sharpened cutting edge perpendicular to the line of the shaft.
In sculpting, a flat chisel is often used to smooth over rough carvings that have been made with either a point or tooth chisel. It can remove marks left by the tools used for roughing out a sculpture, and prepare it for finishing. On softer stones, such as soapstone, a forged steel chisel is usually hit gently with a mallet.