Set of 2 magnets Designed to fit Radio Shack XMOD cars Material: Neodymium (NdFeB) Grade: N45H Coating: Nickel (Ni) Magnetization: Diametric SKU# MXMOD If you are into customizing your XMOD, you want these for High Torque and High Temp. Grade N45H. Very, very strong magnetic material. Heat rated to 248 degrees F. These magnets will provide MAXIMUM Torque for fast starts and better traction. N45 equals very strong magnetic material. The "H" represents a high heat rating. Standard neodymium magnets - those with no extra letter after the number rating - will produce their maximum strength up to 176 degrees F. Beyond 176, standard NdFeB magnets begin to lose strength. These N45H magnets will maintain full strength up to 248 degrees F - perfect for applications which require high heat tolerance - such as some motors. *** These magnets are strong, but they are also fragile. Handle with care. ***