Features Versatile Power Tool Parts: This 1/4in Hex Shank Drill Bit Extension Set includes 3pcs extension rods and a quick drill chuck, making it compatible with a wide range of power tools for various applications. Magnetic Socket for Secure Operation: The magnetic holes at the bottom of the extension tools ensure a secure grip and locking mechanism, providing safety during operations. Efficient Drill Quick Chuck: The drill bit quick chuck effortlessly converts cordless electric screwdrivers into drill bits, enhancing work efficiency and convenience. Durable Material Construction: Made of chrome vanadium steel, the extension rods are heat-treated for increased hardness and wear resistance, ensuring long-lasting performance. Wide Clamping Range: The quick chuck offers a clamping range of 0.3-3.6mm, suitable for a diverse range of clamping projects for added versatility. Specification: Item Type: Drill Bit Extension Set Material: Chrome vanadium steel Purpose: Drill accessories Hex Shank Specification: 1/4in Quick Chuck Clamping Range: Approx. 0.3-3.6mm / 0.01-0.14in Quick Chuck Treatment: Nickel plating Package List: 3 x Hex Shank Extension Rod 1 x Quick Drill Chuck Note: Note that only the bottom of the hole part of the extension rod tool is magnetic, and the hex shank is non magnetic, and is only suitable for single bit drills. Package List 3 x Hex Shank Extension Rod 1 x Quick Drill Chuck