New old stock, original Peugeot tool. This thing is so simple and useful.
You hook the end with the welded disc into the rear teeth of your pedal sprocket. The hooked end grabs onto the flywheel nut. Then you just rotate the pedals back and it compresses the engine spring. This makes working on any part that involves the engine tension spring a breeze.
This is for 103, TSM, TSA. We're not sure if this will work on the later models with separate swing arm like the Vogue, SPX, RCX, etc.. Basically all of the common USA Peugeots should be fine though.
Peugeot part number: 69260