Welcome to our store! Quality Materials: These adapters and reducers are made of high strength 45# steel, heat treated and have a chrome finish that is corrosion resistant, rust proof, high hardness, hard wearing, sturdy and durable. Design Guidelines: Spring loaded distraction balls on adapters lock sockets securely, get the most out of your sockets with this handy set of adapters and reducers that ensure you'll always have the right size for the job. Use: Sits comfortably and securely in your drill chuck or hand-held driver. Comprised of your most common bit sizes 1/4", 3/8", 1/2" and 1/3" change shank sizes Provides versatility and convenience whatever tool you have chosen to use. SET INCLUDES: This set of adapters includes 6 pieces. Adapters: 1/4" - 3/8", 3/8" - 1/4", 3/8" - 1/2", 1/2" - 3/8", 1/4" - 1/ 2", 1/2" - 1/4" Drive (M). Wide Application: Hex conection rod transforms square head, extension head from square inside to outside suitable for electric drill, pneumatic drill, electric wrench, manual wrench, pneumatic screwdriver, electric screwdriver etc. Quantity Delivery: 6 pcs Product color: Silver Product size: 6.35mm, 10mm, 12.5mm, Note: Manual measurement, please allow 1 - 3cm error!!! 100% Satisfaction - Our customers are our priority. If you find any problems with the products after receiving the goods, such as damage and incorrect quantity, please contact us immediately. We do our best to provide you with satisfactory after-sales service.