Check the listing for details. Primacoustic IMPALER-SURFACE Surface Mount Clips for Broadway Panels. Condition: New. Listed at 51.45 USD. Primacoustic surface mount impalers are designed to provide the installer with a simple and effective method of mounting Broadway™ fiberglass acoustic panels onto walls without causing serious surface defacement. The surface mount impaler features a series of sharp protruding darts that penetrate the panel to secure it in place during installation. To ensure panels do not get dislodged after installation, applying a dab of construction adhesive to the impaler darts during the mounting process adds a level of security and reduces opportunity for tampering. Impalers are installed using typical sheetrock anchors and screws.FeaturesTriangular darts let you hang acoustic panels like a pictureInnovative design makes it easy to reloacte panelsMinimal wall defacement only requires filling in a holeSpecificationsMaterial: 20-gauge galvanized steelDimensions: 3" (76 mm) x 4" (102 mm)Attachment Points: 2 (Use an appropriate fastener for wall surface)Max. Load Limit: 12 lbs (5.4 kg) Dependent on wall fastenerNumber per box: 24