Set of impact adaptors for use on all types of impact tools. Manufactured from drop-forged Chrome Molybdenum steel with a manganese phosphate finish for corrosion resistance.4pc Impact Socket Adaptor Set• Set of impact adaptors for use on all types of impact tools.• Manufactured from drop-forged Chrome Molybdenum steel with a manganese phosphate finish for corrosion resistance.• Contents: 3/8(F) x 1/4(M) 1/4(F) x 3/8(M) 3/8(F) x 1/2(M) 1/2(F) x 3/8(M) Sq Drive.• Lifetime guarantee*.• Model No. AK5523Model No: AK5523:Brand: Premier:Contents: 3/8(F) x 1/4(M)PTDSEAAK5523