CORNER CHISEL HSS--- Blade Material : Steel. Allows a rounded recess in wood to be cut to a square recess with the use of a hammer.Ideal for squaring hinge recesses in door frames and door edges, as well as lock faceplates.Spring loaded high speed steel (HSS) anvil for a sharp cut and long life.Light weight aluminium body design.Can be used with the Trend Hinge Jig.Can be resharpened.