Features: *High-Quality Material: This product is made of high-quality material, which is durable and wear-resistant, not easy to break, and can be used for a long time. *Anti-rust: The surfaces of this drill chuck converter is carefully designed to prevent rust and can be used for a long time. *Universal: The round slot for electric drills can be replaced by ground drills, extended aircrafts drills, round handle electric-hammers, ground drills, etc. *Easy to use: The hammer-drill bit adapter holds all sizes of drill bits stably and is easy to insert and remove. * Exquisite workmanship: This converter is made of excellent workmanship and materials, which can bring you a good experience of use. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: steel Length: 105 mm/4.13 inches Diameter: 19.6mm/0.77in Package List: 1 x Round Slot Adapter