SECURES bundles to WALLS STUDS or OTHER SURFACESACCEPTS #10 Screw (not included) EASY 'slip' during pull-thru due to smooth radiuses edgesPatented design with LOCKING TEETH on both sides of the tie ENSURE A STRONGER CONNECTIONMade from DURABLE 100% NYLON 6/6 materialSecures bundles to walls studs or other surfaces easilyUltraviolet black (UVB) ties resist harmful light raysMounting cable ties