CRL Round Metal Mirror Clips have a unique design for 1/4" (6 mm) mirror. These Round Clips use a brass cap that fastens to a screw-on base. This is attached to the wall to conceal the screw head. Supplied with #8 x 1-1/4" (31.7 mm) Flat Head Wood Screws and Plastic Anchors. 4 Clips per set.