Impaling clips measure 1.5" x5" and can be mounted to the wall using standard drywall screws (sold separately). They allow for quick and easy panel placement on virtually any surface. Use impaling clips alone for panels in low-traffic areas or when temporary mounting is necessary. Combine impaling clips and Tubetak Pro adhesive when permanent mounting is required. Auralex Item No. AFN (1 Clip) Get everything you need to maximize the quality of your studio productions here at Sam Ash Direct! Impaling Clip Product Specifications Sizes, 1 1/2"x5"Thickness, 3/4"