this is a spare for the mentioned garden shredder's plunger which ( in the OEM version is hollow and did break under full body weight – yes i needed to push this hard at times)

the plunger body in my replacement is a coarsely cut to size piece of 16mm thick solid wood (left over from old furniture)

the handle is split in a lower and a upper (i expected the lower to possibly break again and thus wanted it to be replacable because the upper took a long time to print on the ender3 i used back then)

you attach the lower to the top with one 4,5-ish-mm selftapper

you attach the wooden board to the base with M6 (?) nuts and threaded rods. beware that due to the fully symetrical design you can not turn any bolts with hexhead in even though that is tempting. you will need either threaded rod cut to length with a slot in one end to turn it or an appropriately sized grub screw.