Handle latch lock for Husqvarna lawn mover, my old one was just to worn out, this one locks in place with a 25mm countersunk m3 bolt and a m3 nut. I suggest printing 2, one for each side. Even though the original design just uses one with a snap fit you move to the other side to lower or higher the handle. This one could just be spun around.

Printed with carbon fiber nylon, 0.4mm nozzle width and 0.2mm layer height, 100% infill. Might be a bit overkill but this is gonna last longer than the original, however I'm not sure my lawn mover is gonna last another 15 years.