The Ascot Supply 4-pc Impact Adapter Set is designed to hold up under stress. It is made of durable CR-MO steel to ensure long tool life and prevent rust and corrosion throughout tough day-to-day use. The adapters come in a black, heavy duty blow molded case for safe keeping and convenient storage, making this set ideal for on-the-go jobs. Included in this socket set are the 1/2 (F) x 3/4” (M) adapter, 3/4” (F) x 1” (M) adapter, 3/4” (F) x 1/2” (M) adapter, and 1” (F) x 3/4” (M) adapter.