Features:*1. 4 size ratchet socket adapters meet your needs.*2. Chrome vanadium drop forged heat treated steel with black oxide finish, not easy to rust.*3. Spring-loaded ball locking retains a firm fit.*4. Perfect tool for impact driver, impact wrench, impact drill, mechanics, engineers, carpenters or DIY enthusiasts.*5. Made of CRV material, with high hardness and durable to useDescription:*1. Material: CRV*2. Color: Black*3. Use Case: 1/2" to 3/8", 3/8" to 1/4", 3/8" to 1/2", 1/4" to 3/8"*4. Size:-1/2" to 3/8": 12.7mm female to 9.53mm male-3/8" to 1/4": 9.53mm female to 6.35mm male-3/8" to 1/2": 9.53mm female to 12.7mm male-1/4" to 3/8": 6.35mm female to 9.53mm male*5. Weight: 4.7oz(132g)Package Includes: 4PCS x Ratchet Socket Adapter