Enhance the versatility and precision of your rotary tools with this comprehensive Drill Chuck Set, designed for seamless compatibility and reliable performance. Crafted from durable brass and aluminum alloy materials, this set includes a 3-jaw self-tightening chuck, a straight line connecting rod, and a hex wrench, making it an essential accessory for micro electric drills and similar rotary tools. Key Features: · Complete Tool Set: Includes a 3-jaw self-tightening drill chuck, straight line connecting rod, and hex wrench, compatible with most rotary tools for versatile use. · Wide Clamping Range: Supports tool shank diameters from 0.3mm to 3.4mm, accommodating various drill bits and accessories for drilling, polishing, and grinding tasks. · Self-Tightening Design: The collet automatically tightens around the tool shank for secure holding, easily loosened with the included open-ended wrench for quick tool changes. · High-Quality Brass Connecting Rod: Made from corrosion and oxidation-resistant brass, ensuring long-lasting durability and wear-resistant threading for reliable performance. · Standard Size and Easy Installation: Designed with standard dimensions for quick and hassle-free installation and disassembly, suitable for micro electric drills, electric mills, and other precision tools. Specifications: · Item Type: Drill Chuck Set · Jaw Type: 3 Jaw · Installation Method: Knob · Clamping Range: 0.3-3.4mm · Material: Brass, Aluminum Alloy · Use: Compatible with micro electric drills for grinding, polishing, and drilling applications Package Includes: · 1 x 3 Jaw Self-Tightening Drill Chuck · 1 x Straight Line Connecting Rod · 1 x Hex Wrench This Drill Chuck Set delivers precise tool holding and easy operation, making it ideal for hobbyists and professionals who require accuracy and efficiency in their rotary tool applications. Durable materials and a practical design ensure long-term use and excellent performance in a variety of tasks.