Feature:<br />-100% new and high quality.<br />-These tools adapt to the situation on the fly to get it done. T<br />hey create replacements for lost or broken sockets， expand incomplete socket sets， and Allows greater flexibility for all sockets and drive tools. <br />-Ball detent securely holds sockets on the coupler. <br />-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. <br />-Suitable for use with air pneumatic， electric impact wrenches and ratchets.<br /><br />Specifications:<br />Product name: Adapter <br />Surface treatment: Black phosphating， laser marking<br />Color: Black<br />Material: 42CR-MO steel<br />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<br />Hardness: (HRC) 40 ÷ 2<br />Quantity: 4PCS<br />Weight: 133g<br /><br />Package Include:<br />4x Pneumatic sleeve adapter