The FAST Crank Trigger is a magnet free device with a durable wheel constructed from high strength steel. With a .125" wheel, it requries less space than compmetitors' aluminum versions. With the wheel being this thin, it not only weighs less but requires less space than competitors? aluminum versions. The FAST inductive sensor is also much smaller than others on the market and is hermetically sealed with the connector molded into the body. This long lasting sensor is used by OEMs both on and inside the motor and provides accurate timing. Compatible with XFI 2.0, XFI Sportsman, EZ-EFI 2.0 or for use with other aftermarket EFI/ignitions.