Collins CTS-10 test breakout box manufactured by ASI. This box is a must when troubleshooting any Collins Proline II or 4 equipment with thinline 60 pin connectors or most of Collins autopilot, air data computers and flight directors with 60 pin thinline connectors such as APS-80, FCS-80, APS-65, ADS-80 etc. No more back pinning trying to measure a