A range of precision laser cut stainless steel disks for the most common Optical Distributor and Cam Angle Sensor (CAS) units. Used to convert the output signal trigger waveform from fine pitch pattern (360 pulses per rev) to a simple trigger pattern. Available for Nissan and Chevrolet Optical Distributor and Cam Angle Sensor (CAS) units. Use with Engine Management ECUs that are incompatible with fine pitch triggers. SMC, SM2 and early revision SM4 Engine Management ECUs require this trigger conversion.