Cobra Anchors 420M FlipToggle Toggle Bolt, 3/16-24 x 2-1/2", 25-PackThe FlipToggle anchor,s strong toggling mechanism supplies extra holding power in drywall, plaster or hollow concrete blocks. Its main feature is its ability to be installed in thicker hollow wall material, up to three inches thick. Its simple and effective tilting mechanism ensures a trouble free installation every time, and is twice as strong as the regular toggle bolt of the same bolt diameter. The FlipToggle requires a 1 2" hole regardless of its