【Extended Design, Efficient Work】 The 100mm extension rod, combined with a standard hexagonal interface, is compatible with many tools. It extends the operating distance, making it easy to handle work in tight spaces or deep holes, thus improving work efficiency. 【Self-locking Magnetic Clamping Head, Stable and Durable】 Equipped with a built-in powerful magnet and a self-locking design, it firmly fixes the bits and prevents them from falling off, ensuring stability even during high-torque operations and extending their service life. 【Wide Compatibility, Flexible Application】 Suitable for cordless drills, hand drills, and other common power tools, it meets the needs of many scenarios such as carpentry, mechanical maintenance, and electronic assembly, and offers versatile use. 【Stainless Steel Material, Corrosion and Wear Resistant】 Made of high-quality stainless steel, it is rust and corrosion resistant. Coupled with a precisely crafted 10.5mm hexagonal interface, it is durable and suitable for intensive working environments. 【User-Friendly Dimensions, Easy Operation】 Its compact 100 × 10.5 × 40mm design combines length and comfortable grip. The magnetic interface allows for faster bit changes, saving time and effort.