Features: *6.3mm series screwdriver head connector *It is forged with high-quality chrome vanadium steel 50BV30, strong and. *The mirror finish is polished and chrome-plated, which has strong resistance and is easy to. Specification: *Material: chrome vanadium steel *Color: silver *Size: 1/4" square hole to 1/4"(6.3mm) 3/8" square hole to 8mm 3/8" square hole to 10mm 1/2" square hole to 8mm 1/2" square hole to 10mm *Quantity:5PCS/set *It is used for screwdriver bit, socket adapter,step drill,chamfer converter Package Contents: 5pcs x converter Notes: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. 【 Chrome Vanadium Steel】Made of chrome vanadium steel 50BV30, this converter is forged to be strong and for durable, long-lasting performance. 【Mirror Finish and Chrome-plated】The converter is polished to a mirror finish and chrome-plated, providing excellent resistance and rust for extended use. 【Multiple Sizes and Options】Available in various sizes, including 1/4" square hole to 1/4" (3mm), 3/8" square hole to 8mm, 3/8" square hole to 10mm, 1/2" square hole to 8mm, and 1/2" square hole to 10mm, allowing for versatile applications. 【Wide Compatibility】This converter is designed to connect screwdriver bits, socket adapters, step drills, and chamfer converters, providing compatibility with different tools. 【Convenient 5PCS/Set】The package includes a set of 5 converters, providing ample options for various tasks and you have the right converter at hand whenever needed.