Description: 【Durability】Crafted from premium chrome vanadium steel with a sturdy construction, this extension rod offers exceptional wear resistance and is less prone to breakage, ensuring long performance even under heavy duty use. 【Compatibility】Designed for versatility, it works seamlessly with various bits and sockets, and is fully compatible with 6.35mm hex tools—ideal for automotive repairs or DIY projects without the need for extra adapters. 【Secure Locking】Equipped with a steel ball self-locking system that firmly holds bits place, it ensures safe and locking during use while minimizing slippage for enhanced control—especially useful in hard-to-reach areas. 【Efficiency】The innovative push-pull mechanism allows rapid tool changes to minimize downtime and maximize drilling efficiency in any setting. 【Package Contains】: Includes a bits extension, allowing you to complete your work better and faster Specification: Material: Metal Size Chart: 7cmx0.6cm/2.76inchx0.24inch Package Includes: 1 Bits Extension Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.