KnR Harmony2 Stück Zugfeder 56.5mm/2.22 Zugfedern Haken Doppelstufenfeder Edelstahl Doppelhaken spannfeder freie Länge Federstahl Kleine Ersatz Komprimierter Federdraht für Furniture Geräte

Did the job nicely.

After some heavy duty use, I got the pruner tangled and when I extricated it, the return spring had sprung, probably into my neighbour's overgrown garden. I needed a spring the next day to finish the job, and these were the best I could find. In the end I used both as they were too short individually and bent the hooks in to keep secure. Nice job, actually a bit stronger which is helpful TBH. I know nothing about drums - sorry :)

Worked perfectly