CRL Single Set Screw Glass Clamps are designed for lightweight glass mounting solutions such as erecting small signs, low glass partitions in kiosks, or attaching shelves to walls. These solid brass clamps can be used for a variety of glass applications. It is recommended that these clamps be attached into wall studs or a wood substrate using CRL Cat. No. 8X112FHPSMS Flat Head Phillips Screws (sold separately). The glass is secured by a plastic tipped set screw. They can be installed without drilling holes in the glass. Clamps are designed to solve glass mounting problems such as flush glazing, connecting panels for railing systems or attaching shelves to walls.