Ironton Impact Adapters - 8-Pc. Set Chrome vanadium steel wears longer and holds up under stress Coated with black finish to reduce rust and corrosion In sizes 1/4in.F x 3/8in.M; 1/2in.F x 3/8in.M; 1/2in.F x 3/4in.M; 1in.F x 3/4in.M; 3/8in.F x 1/4in.M; 3/8in.F x 1/2in.M; 3/4in.F x 1/2in.M; and 3/4in.F x 1in.M Heavy-duty case keeps adapters together and sorted (8) Impact adapters (1) Case Chrome vanadium steel wears longer and holds up under stress Coated with black finish to reduce rust and corrosion In sizes 1/4in.F x 3/8in.M; 1/2in.F x 3/8in.M; 1/2in.F x 3/4in.M; 1in.F x 3/4in.M; 3/8in.F x 1/4in.M; 3/8in.F x 1/2in.M; 3/4in.F x 1/2in.M; and 3/4in.F x 1in.M Heavy-duty case keeps adapters together and sorted