barbell or dumbbell locker 26mm 28mm

These lockers are very simple to print and I`m surprised by their strenght.
You will need an M3x20mm screw to mount the 2 components of each locker.
I suggest to use ABS or PETG for a much stronger print. I used PLA and it works fine but it may deform over time.

EDIT 12/25/2021: I finally got around re-designing some collars both for 50mm and 28mm bars. You can find the much improved version here:
https://www.thingiverse.com/thing:5174308