CRL's Adjustable Edge Grips have a removable Cap to permit adjusting this versatile fitting for panel thicknesses from 1/4" to 1/2" (6 to 12 mm). The Edge Grip can easily be installed to any substrate by using the screw which is included in the pack. The Adjustable Grip provides quick installation and adjustment to safely secure panels. It is recommended that Edge Grips be mounted at both top and bottom of panels with additional Edge Grips added for large or heavier panels.