Engineered for use with impact drivers, the TEKTON 3/4 in. Drive (F) to 1/2 in. Drive (M) Impact Reducer multiplies the range and capability of your existing socket system, giving you more options for dealing with the unexpected. Made from 8660 Nickel-Chromium-Molybdenum that is precisely heat treated for superior strength, and protected by a corrosion-resistant manganese phosphate finish. Works with both friction ring and detent pin impact wrench anvils.