Magnetic Stainless Steel bit holder for use in impact driver,  power drills and driver handles Magnetic socket holds most common ¼” hex screwdriver bits securely. Quick bit changes for convenience. Length 60mm 1/4 Inch hex drive Robust shaft Sturdy bit holder is cold forged from stainless steel Holder houses a powerful permanent magnet to hold screwdriver bits securely in place Ideal for impact drivers