First print in PLA snapped after a few dozen uses, PETG has been holding up for months now (almost daily use securing a shower curtain). 

Printing Instructions:

Check orientation: 

• Winged screw should be printed on the wings, threads facing upwards.
• Clamp is printed on the side.
• Washer is up to you.

Use a brim for the winged screw, it does NOT need support but you have to print it on the wings. 

Print with 3+ perimeters.