UPDATE: I have added 3 new STLs which require no support for decreased print time! I will leave the original 3 up for those that need some to really lock closed. I have also added the gcode files for bulk printing on the MK3S+ with PLA.
These twist and lock firmly into place and work great! After much trial and error I'm at this latest design that comes in 3 different size diameters. 0.75 inch, 1 inch, and 1.5 inch.
Print instruction: Print with max perimeter thickness for a stronger tie (no infill). Twist in same direction when reusing. Add some support if you're printing the old style.
The author marked this model as their own original creation.