The Model CVAUMP (Construction Vehicle Alarm Universal Mounting Plate) adapts the Model CVA mechanical back up alarm to different bolt patterns.  When mounting it to equally spaced 3, 5, 6 or 10 lug bolt patterns having approximately 2 to 9 inch bolt circles. (As purchased, the Model CVA will accommodate wheel lug bolt patterns with equally spaced 4, 8 or 12 lugs and bolt circles of approximately 2 to 13 inches.)