1. Multi Size Adapter SetThis 7 piece adapter and reducer set contains 4 different sizes of socket adaptors: 1/4' x 66mm, 3/8' x 64mm, 1/2' x 72mm. It allows you to easily switch between different drive sizes, providing versatility and convenience for different applications. 2. AND RELIABLE Made from chrome vanadium steel 50BV30, these socket adapters are built to last. The material is durable and reliable, making them suitable for tough use in various working environments. 3. Precise and secure fit: The ratchet socket adapter set is designed with precise measurements and a secure fit. Each adapter is specially designed for a tight connection between different drive sizes, ensuring efficient power transmission. 4. Easy to use: With the quick and simple design, these socket adapters are easy to use. Simply plug the adapter into the appropriate drive size and it locks securely into place, allowing you to quickly switch between different tools and sockets.