Deep wall cavities on handrails, tall shelving, or commercial partition work — a 3-inch bolt bottoms out before the toggle seats in walls that go deeper than standard depth. These 4-inch 1/4-20 toggle bolts give you the thread engagement you need for deep assemblies without stepping up to a 5/16-inch diameter that would require oversized mounting holes and compromise the mounting surface. 4-inch thread length handles deep hollow wall assemblies in commercial, multifamily, and industrial work where wall depth isn't standard. The 1/4-20 thread still accepts standard 1/4-inch hardware accessories — bolts, washers, and lock nuts that are commodity items at any hardware supply. 50-piece box keeps you covered for the job where multiple deep-wall anchors are needed and a hand full of bolts isn't Stocked at Crofton Lumber and Akron Lumber.