3 Hole - Center Tap Base Plate Inch For Profile Type Double Fastener Thread Size 7/16 In.-14 Anodized Overall Height 3 in Aluminum 15 Series Includes Fasteners No Overall Depth 3/4 in Overall Width 1 1/2 in Mounting Hole Diameter 5/16 in Required Tap Thread Size 7/16 In.-14 Fastener Mounting Type Drop In Adjustable Yes White Compatible Brand and Series 80/20 15 Series Includes Tap