Feature 1Air Impact Quality 1/4 , 3/8 , 1/2, 3/4" Drive 2Reduces & Increases Drive sizes to allow for greater flexibility for all your sockets and drive tools 3Attaches to your AIR Tools, ratchets & other drive accessories 4Ball bearings on each piece to ensure sockets lock firmly into place 5Matt Black Oxide finish for rust prevention Features: Air Impact Quality 1/4 , 3/8 , 1/2, 3/4" Drive Reduces & Increases Drive sizes to allow for greater flexibility for all your sockets and drive tools Attaches to your AIR Tools, ratchets & other drive accessories Ball bearings on each piece to ensure sockets lock firmly into place Matt Black Oxide finish for rust prevention Complete set which covers every application from 1/4" to 3/4" Drive All In a Solid Blow Mold storage Case GREAT VALUE!! Specification: 1/4" (F) x 3/8" (M) 3/8" (F) x 1/4" (M) 1/2" (F) x 3/4" (M) 3/4" (F) x 1/2" (M) 3/8" (F) x 1/2" M) 1/2" (F) x 3/8" M) Package Include: 6PCS Socket Adaptor & Reducer