5 Hole - Center Tap Base Plate, Inch, For Profile Type Quad, Fastener Thread Size 1/2 In.-13, Anodized, Overall Height 3 in, Aluminum, 15 Series, Includes Fasteners No, Overall Depth 3 in, Overall Width 3/4 in, Mounting Hole Diameter 5/16 in, Required Tap Thread Size 1/2 In.-13, Fastener Mounting Type Drop In, Adjustable Yes, White, Compatible Brand and Series 80/20, 15 Series, Includes Tap