Function: Magnetic drill bit holder, which can fix the drill bit and can be used with the impact screwdriver for easy maintenance and tightening of screws. Suitable for 1/4" drill bit. It can drive drywall screws quickly and accurately. Flexible screwdriver holder with 90mm and 145mm lengths to meet the needs of screws in different situations. Rotating Design: The magnetic drill bit holder rotates for perfect penetration into small spaces and hard-to-reach places. Help you solve the problem of not being able to work in narrow places. Stability: Powerful magnets and 1/4 hex shank easily grab screws and hold the drill bit securely in place. Hold the screw firmly so you can drill the hole with one hand. You don't need special drill stands. Locking Function: The quick-change holder with locking function on the straight knife holder holds the screws perfectly in place without falling off, making installation easy. WIDE APPLICATIONS: The quick-change bit holder is suitable for drywall