Premium Material - The bit holder is made of high-quality steel, and the sleeve is made of high-quality aluminum alloy, providing maximum durability. Rust-proof, corrosion-resistant, and oxidation-resistant.

5 Sizes of Drill Bit Extension - 50mm, 60mm, 100mm, 150mm, 300mm, to meet your different needs, perfect for reaching tight corners and confined spaces.

Built-in Magnet - The bottom of the hole is equipped with a permanent magnet that can hold the bit in place, ensuring that the bit is firmly seated and does not wobble during use.

Improve Work Efficiency - The drill bit extender is very useful for removing or tightening a large number of screws after they have been started or loosened. Perfect for working with hard-to-reach screws.

Universal Size - Compatible with drills, screwdrivers, impact drivers, and various other tools, these bit holders extend the functionality of your equipment with their 1/4-inch hex shank.