Wide Clamping Range: This all-metal ratcheting self-locking drill chuck head is designed to securely hold drill bits within a range of 0.8mm to 10mm. It provides versatility and compatibility with various sizes of drill bits. widespread Connection:this drill chuck head is equipped with a standard threaded interface that allows it to be easily connected to most hand drills and power drills. It ensures a reliable and stable connection during drilling operations. Enduring Metal Construction: Made entirely of high-quality metal, this drill chuck head offers exceptional durability and strength. It is built to withstand heavy-duty use and provides long-lasting performance, ensuring years of reliable use. Easy to Use: The self-locking mechanism of this drill chuck head allows for quick and effortless bit changes. only tighten the chuck clockwise to securely lock the drill bit in place or loosen it counterclockwise to release the bit. It provides convenience and efficiency during drilling tasks. Versatile Application: Suitable for various drilling applications, this drill chuck head is perfect for woodworking, metalworking, construction, and DIY projects. It enables precise and accurate drilling, making it an essential tool for professionals and hobbyists alike. Product Name:Ratchet Self-Locking Drill Chuck Head Clamping range:0.8-10mm Connection size:3/8-24UNF Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:As Shown Material:Metal Package Contents: 2 x Ratchet Self-Locking Drill Chuck Head Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.