Magnetic bit holders with universal 1/4 hex shank feature built-in strong magnetism to better stabilize the drill bit and prevent it from dropping. The quick release design enhances efficiency, offering a convenient and fast solution with just one step. The magnetic force is located at the connection between the extension rod and the bit. (The magnetic force cannot be transmitted, and the bit head is not magnetic.) Bit extension for impact driver is made of durable chrome vanadium steel with excellent concentricity. The red coating provides additional protection to the metal, enhancing durability and corrosion resistance. Designed to meet various needs, this bit holder tool kit includes three different lengths: 2 inches (60mm), 4 inches (100mm), and 6 inches (150mm). These lengths offer high versatility and are easy to replace. The drill bit extender is compatible with pneumatic screwdrivers, electric screwdrivers, pneumatic drills, manual screwdrivers, and all 1/4-inch drive bit tools. It is ideal for working in tight or hard-to-reach areas. Whether for home or professional use, these extensions help you work efficiently in narrow or difficult environments. The package includes: quick release magnetic drill bit holders with 1/4 hex shank in 2 inch, 4 inch, and 6 inch lengths.