These pegboard pegs snap in and hold surprisingly well. Haven't had any issues with them breaking off, although I wouldn't use them for holding anything heavy (I have another, curved design that is better for heavier objects). I printed mine in eSUN PLA+.
They suit pegboards with 4mm holes. Print horizontally for strength, using a raft or attached brim for bed adhesion on the curved surface.
The author marked this model as their own original creation.