Features: ● Premium quality: It is made of vanadium steel and has been heat treated with black oxide coating. It has good performance in withstanding normal torque compression. ● Product size: The kit includes various adapters and reducers. It will add excellent versatility, including the following conversions and sizes, from 3/8" to 1/4", 1/2" to 3/8" diameter reduction, 1/4" to 3/8" adapter, 3 /8 "Adapter" to 1/2". ● Unique design: Provide greater flexibility for sleeves and drive tools, and maximize the versatility of ratchets and sleeves. The spring fixing ball ensures the safety of your plug through the through hole, allowing the use of locking pins and locking rings. ● The package includes: 4 inch to 2 inch reducer, 5 inch to 4 inch reducer, 0.2 inch to 0.4 inch adapter, 0.4 inch to 0.5 inch adapter. ● for Ideal choice: It is your best choice when you are working. Specifications: ● Material: Metal ● Color：Black ● Size: Approx. 3/8“ 1/4” 1/2“ 3/4“ Package Includes: 1xPneumatic Joint note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.