5/16" x 4" Toggle Bolts / Round Head / Combo Drive / Steel / Zinc / Anchor Size: 5/16" / Screw Size: 5/16-18 x 4" / Drill Bit / Hole Size: 7/8" (Quantity: 25 pcs)

A fastening system consisting of (1) two matching steel “wings” each bent at two 900 angles, (2) an internally threaded nut with protrusions spaced 1800 apart which serves as a pivot attaching the two wings, (3) a wire spring providing the necessary tension to open and close the wings, and (4) a machine screw which mates with the nut. Toggle bolts are light-duty anchors for use in hollow block or gypsum wallboard. They spread the load over a larger area and are more temperature resistant than other hollow wall anchors. They are single-use anchors.