VSR Pro 10™ Traction Magnets are the strongest compression molded traction magnets you can get at an affordable price. Pro 10™ magnets are designed with speed and handling in mind. These magnets are typically used for modified racing and VSR recommends using performance armature and aftermarket track power supply for best results. Drop in replacement for Tyco 440X2. These are the strongest Polymer magnets available for the Tyco 440X2 Not Currently a Dealer a dealer item