ITEM NAME:4 1/4" 3/8" 1/2"Ratchet Socket Adapter Reducer Converter Set Air Impact Tool Z Feature: -100% new and high quality. -These tools adapt to the situation on the fly to get it done. T hey create replacements for lost or broken sockets, expand incomplete socket sets, and Allows greater flexibility for all sockets and drive tools. -Ball detent securely holds sockets on the coupler. -Made of the highest quality chrome vanadium steel, each piece undergoes a precise heat treating process, hardening and strengthening it for use with impact wrenches and drivers. -Suitable for use with air pneumatic, electric impact wrenches and ratchets. Specifications: Product name: Adapter Surface treatment: Black phosphating, laser marking Color: Black Material: 42CR-MO steel Optional specifications: 1/4" Male to 3/8" Female, 3/8" Male to 1/4" Female, 3/8" Male to 1/2" Female, 1/2" Male to 3/8" Female Hardness: (HRC) 40 ± 2 Quantity: 4PCS Weight: about 130g Package Include: 4x Pneumatic sleeve adapter.Ball detent securely holds sockets on the coupler. Hardness: (HRC) 40 ± 2. -Suitable for use with air pneumatic, electric impact wrenches and ratchets. 4x Pneumatic sleeve adapter. Quantity: 4PCS. -These tools adapt to the situation on the fly to get it done.