SNAPTOGGLE heavy-duty toggle bolts carry twice the load in a smaller hole than standard wing anchors. SNAPTOGGLE heavy-duty toggle bolts do NOT spin when installed with a screw gun. A new, patented strap design with sturdier straps and smaller ratchet interval adjusts more precisely and snaps off flush to the surface. Anchor installs behind 3/8" – 3-5/8" wallboard, drywall and hollow masonry. Recommended working load is 1/4 of ultimate load: Ultimate Tensile Pull-Out Value: 5/8" Drywall: 356lbs.; 1/2" Drywall: 265lbs. Ultimate Shear Test Results: 5/8" Drywall: 324lbs. ; 1/2" Drywall: 241lbs. See specifications for load ratings on additional materials. Use with 1/4"-20 thread size bolts, sold separately.