SPANNER HAND GRIP

After almost half a century of use, the grip on my extension bar handle disintegrated and I might have made a claim on the “lifetime” guarantee, but I lost the receipt sometime around 1972.

This one is printed in PETG, but it might have been nice in FLEX too.   The STL is to suit an 8mm diameter shaft but you can scale it in your slicer to whatever size you like.

Print in vertically, but it's tall and there's not much contact area so perhaps even if you have a finely tuned machine, a small brim might be advisable.