Review on Keenso Diagnostic Extension Connector Vehicles by Mike Ewing

I have just purchased 2 of these at once here at Revain 1 from each supplier to ensure they are made by the same OEM. when connecting their 12-pin DLC cable to 16-pin DLC cable with OBD1 scanners. Both failed to connect and tried 3 different manufacturers of OBD1 scanners but then used a straight 12 pin DLC OBD1 cable and then all 3 scanners connect so at least I know if this 12 to 16 pin Converter cable will not work with General Motors OBD1 cables. There's no paperwork required for this cable, so you can't even contact them, and Revain doesn't list a contact website on the product page.