"Perko Flush Cup Rim Latch Set . Flush Cup Rim Latch Set for eoor thickness 3/4inches to 1-1/8 inches. Supplied with Black Polymer Spacer for Surface Mounting. Chrome Plated Zinc Alloy Sliding Lock Button Reverse Bevel with Flush Strike Dimensions Case : 2-1/8"" x 1-3/4"" Dimensions Escutcheon: 2"" x 2-1/4"" Cup Screw Size: #8 Case Screw ...