Supports hammers with a diameter of up to 34 mm and a shaft diameter of up to 30 mm.

In order to have the maximum strength in the hooks you should print the part using this orientation (tree supports, on build plate only):

I printed this in PETG with a 0.6 mm nozzle, 0.24 mm layer height, 2 walls/perimeters and 15% Grid infill.

On request I can provide versions with other diameters or you can modify the STEP file yourself.