CRL Set Screw Glass Clamps are designed to attach glass without having to drill holes in the panels. 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), and are secured to the glass with plastic tipped set screws. Economically packaged 10 per pack for your convenience. Clamps are designed to solve glass mounting problems such as flush glazing, connecting panels for railing systems or attaching shelves to walls.