This versatile pack includes 3 Drill Bit Extensions in the lengths of 20/30/50cm, all with a common shaft diameter of 3/4inch. Use them individually or combine them based on task requirements, a practical solution that saves time and enhances work efficiency. Expand your drilling ability effortlessly with these extension rods. Eliminate the need to replace the entire drill bit, as our extension set facilitates your spiral drill to reach depths. They maintain maneuverability in narrow spaces without compromising performance, making them perfect for versatile use. Manufactured with High-quality materials, our spiral drill extension rods offer remarkable strength and hardness. They resist bending and deformity under pressure, while their black coating boosts durability and provides protection against corrosion, ensuring a long useful life. Our extension rods are designed to promote quick and simple connection. Secure them end-to-end with a bolt and insert a pin to lock them. Fitting perfectly between the engine power head and , they provide stability and precision during drilling operations Whether it's pre-drilling in wooden structures or boring through soil, these extension rods are suited to a wide range of tasks. From woodworking and construction to gardening and pipeline installations, enhance your hole 's flexibility and take on projects with confidence. note: The actual product may have slight color differences or differences, which does not affect use. Material: Metal colour: Black Package Contents: 3 x Extension Drill Bits(about 20/30/50cm) 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.