about this project Universal 1/4 hex shank magnetic drill holder with built-in strong magnetism, which can better stabilize the drill bit and wont drop the drill bit. The quick release design makes your life and work more efficient, one step in place, convenient and quick. Magnetic position: extended The connection between the rod and the drill bit. (The magnetic force cannot be transmitted, and the drill bit cannot be magnetic!) Impact driver extensions are made of stable and strong chrome vanadium steel with excellent concentricity. The beautiful red coating can provide secondary protection to the metal, more durable and protective. To meet the needs of various environments, this bit holder tool set combines three different lengths, namely: 2"/60mm, 4"/100mm, 6"/150mm. Three lengths are versatile and easy to change. The bit extender works with air screwdrivers, electric screwdrivers, pneumatic drills, hand screwdrivers and all 1/4" drive bit tools. It's great for working in some places where you need to stick your head out. Whether it is living or working, there will always be some cramped or difficult to operate environments. At this time, you only need to use 3 lengths of magnetic extension drill pipe, which can provide you with efficient and convenient service. Package contains: 2", 4", and 6" Quick Release Magnetic Drill Holders with 1/4" Hex Shank.