Check the listing for details. 1/2 In. Insta-Back Drywall Repair Clips (50-Pack). Condition: New. Listed at 48.13 USD. Helps eliminate sagging wallboard to offer neat lookFree from bumps and ridges to ensure smooth lookFire-resistance rating by UL allows for reliable performance The insta-back drywall fasteners make wall, corner and ceiling installations and repair easier, faster and safer. By using these remarkably simple components, a number of time consuming steps can be eliminated. You will also save money by reducing waste and eliminating unnecessary framing members and material.Eliminate the need to cut wallboard back to the nearest stud, making for quick, easy repairsMake finished butt joints that are bump-free, no ridges of crownsEliminate sagging wallboard between trussesICC-ES compliant refer to ICC ESR-1812Fire resistance rated by underwriters laboratories (UL) and warnock hersey tested our fasteners for one and two hour walls and ceilings, our fasteners are the only back-up fasteners approved by model codes for use in residential, commercial and multiple housing constructionShear (structural) value - our fasteners meet the wind and seismic force values noted in 25-I, ICBO, tested under ASTM E72-80 for structural adequacy by national gypsum labsOur fasteners are approved for use with steel studs50 - 1/2 in. insta-back repair clips per box