Perfect Conversion: The telescopic chuck adapter can convert 1/2" (12.5mm) square socket to 1/4" (6.35mm) hex socket, it can well convert the pneumatic or powerful impact wrench into a hex drill, or convert the ratchet wrench into a screwdriver bit holder. Good Performance: The hex chuck converter can finish the conversion quickly, exquisite workmanship gives it excellent strength and durability, as well as high impact resistance. You can use with confidence. Superior Material: The drill chuck adapter is made of high quality alloy, it has good workmanship, smooth surface, all parts are delicately processed, it is tough and durable, it can maintain good performance even after long-term use. Easy to Use: You just need to connect the 1/2" square socket with the powerful impact wrench, then connect the 1/4" hex socket with the hex shank drill or screwdriver bit holder. The operation is simple and easy. Wide Application: The quick release chuck converter is widely used in many places, it is well suited for converting household electric impact wrenches, and it is also perfect for professional people, it can greatly improve your work efficiency and save time.Features: --- Practical and Convenient: The chuck converter can quickly convert according to your need, you can save time and finish your work easily. --- The high-quality alloy material has high impact resistance and high hardness, long service life and is more durable. --- The hex shank adapter can securely mount any 1/4 inch hex drill. Specifications: Material: Alloy Color: Black Quantity: 4 Pcs Size: Top Diameter: 18 mm Bottom Diameter: 22 mm Length: 50.5 mm Package Included: 4 X Chuck Converter