With the Bosch pro Standard Bit Holder Impact bit holder 300 mm, you easily access deeply recessed fasteners in narrow cavities and obstructed spots. Featuring an extended length of 300 mm and a slim profile, it allows you to fasten between closely spaced studs, joists, or panels with ease. The heavy-duty 1/4" hex shank is built to withstand high torque demands from both impact drivers and drill drivers. a permanent magnet keeps standard 1/4" screw bits securely in place, preventing dropped bits during demanding or overhead applications. Fasten with confidence, speed, and full control on every job.