ITEM NAME:3/8" to 1/4" 1/2" inch Drive Ratchet Socket Adapter Reducer Air Impact Set 4 x 3/8" to 1/4" 1/2" inch Drive Ratchet Socket Adapter Reducer Air Impact Set 4 x Specifications: Material: CRV Size: 1/2inch to 3/8inch: 12.7mm square hole to 9.53mm square head 3/8inch to 1/4inch: 9.53mm square hole turn 6.35mm square head 3/8inch to 1/2inch: 9.53mm square hole turn 12.7mm square head 1/4inch to 3/8inch: 6.35mm square hole to 9.53mm square head Features: 4pc Ratchet Socket Adapter Reducer Converter Set Tool Kit. Chrome vanadium drop forged heat treated steel with black oxide finish. Spring loaded ball bearing retains socket Ball detent locks onto drive tang. This set allows you to mix and match drive sizes for your sockets, ratchet handles, extension bars and other accessories. Ideal tool for mechanics, engineers, carpenters or DIY enthusiasts. Package included: 4pcs x Drive Ratchet Socket Adapter Notes: Please check as much as possible to make sure the item is the one that you need. Please allow slight dimension difference due to manual measurement. Due to light and screen difference, the item's color may be slightly different from the pictures. Item Show.4pc Ratchet Socket Adapter Reducer Converter Set Tool Kit. This set allows you to mix and match drive sizes for your sockets, ratchet handles, extension bars and other. 4pcs x Drive Ratchet Socket Adapter.