Premium Materials: The brake square head adapter is made of heavy duty, heat treated chrome vanadium steel with a corrosion resistant black oxide finish and are nickel/chrome plated to resist corrosion, eliminating the risk of rust and extending tool life for industrial, mechanical or construction work. What You Get: Our impact socket adapter reducer kit includes an adapter from 1/4" to 3/8", a 3/8" to 1/4" adapter, a 3/8" to 1/2" adapter, a 1/2" to 3/8" adapter, a 1/2" to 3/4" adapter, a 3/4" to 1/2" adapter. These powerful impact adapter reducers are designed for impact drivers and most other tools to convert driver size sets into your kit for any home or automotive improvement job.< /p> Easy to Store: All adapters are organized in a transparent plastic case to protect components and easy to carry, organization and storage, keep areas cleaner and tidy, convenience for your job. The dimensions are printed on the surface of each product, you can identify the model more easily. More Convenient: The socket adapter set can be used with an impact wrench or a manual wrench . It allows you to use the socket set you have to complete repair jobs that require other drive sizes, saving you the time and expense of repurchasing new tool sets. Wide Application: Socket drive adapter reducers have a built-in ball brake designed to hold them securely in the socket and prevent them from tipping. Suitable for the use of all battery, electric and pneumatic impact wrenches, break bar, ratchet and torque wrench etc.