All aluminum with 2 rare earth magnets imbedded to hold in place. Fits vehicles with 2 inch or larger pinch weld. Note: The Jack pad is made to lift the car from bottom of pinch weld as the stock jack would do. YES!! THEY ARE FOR ALL LATE MODEL UNIBODY CARS WITH GROUND EFFECTS. NOTE: Jack pad may not work on the Boss Mustang with side exhaust, may need modification for the rear, front does fit.