We needed a handy shovel for our turtle cherish and I tried to design my own version of it.
The design uses an M5 threaded insert in the handle and a countersunk allen screw (16mm) to mount the two parts.
I used the threaded insterts from CNCKITCHEN and can totally recommend them:
https://cnckitchen.store/de/products/gewindeeinsatz-threaded-insert-m5-short-50-stk-pcs
The author marked this model as their own original creation.