براغي ماكينة 5/16-18 × 4 بوصة | رأس جسر محرك مزدوج | فولاذ مطلي بالزنك (100 / عبوة)

The combination drive saved me when my bit slipped on a regular slot — just flipped the screwdriver over and kept going. These four-inchers held my heavy shelf brackets solid after a full week, and the zinc coating hasn't shown a speck of rust.

The truss heads sit flush without stripping, and the combination drive makes it easy to switch bits. These 4-inch screws are just what I needed for fastening through thick wood into metal studs.

Had a project that needed extra-long fasteners, and these 4-inch truss heads grabbed perfectly without stripping. The combination drive let me use either my Phillips bit or a flathead, which saved me a trip back to the toolbox.