Description: 4pcs socket adapters of different sizes-1/2 "to 3/8"; 3/8 "to 1/4"; 3/8 "to 1/2"; 1/4 "to 3/8". Very handy tool accessory that adds versatility to your sockets. Made from hardened treated Chrome Vanadium steel alloy (CRV), corrosion-retardant. Designed for Impact use and feature spring-loaded detent balls to securely latch sockets, while the through-holes in the drive end of the adapters and reducers lock onto the drive tang. the sizes are even etched onto the adapters and reducers for easy identification. Perfect tool for mechanics, engineers, carpenters or DIY enthusiasts. Specification: Material: CRV Size Chart: Size: 1/2" to 3/8": 12.7mm square hole to 9.53mm square head 3/8" to 1/4": 9.53mm square hole turn 6.35mm square head 3/8" to 1/2": 9.53mm square hole turn 12.7mm square head 1/4" to 3/8": 6.35mm square hole to 9.53mm square head Package Includes: 4 Pieces Ratchet Socket Adapter.(6 Pack) : Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.