This 3D model was originally created with Sketchup 13 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 Roughly approximates a Radio Shack speaker terminal plate part number 274-0632, UPC barcode # 040293132125 as sold current to the date of January 27, 2012. Actual dimensions: The holes to secure this to a speaker housing are drilled with a 7/64" drill bit. The distance between holes is 1¾" center to center. Cut-out area into the speaker housing behind this plate for wire and wire terminals to pass through should be 1¼" x ⅜". Additional Color Information: Contacts for speaker wire soldering on back are gold plated metal.