This “Snap-Proof” armature from the premium doll armature manufacturer Jeton has a spherical shape to the small end of the link.
Plastic Doll/Toy Skeleton 1/8 Size
Little Raven's Armature Guide
DOLL MAKING DOLL Armature LOT (11) Various Sizes $67.47 - PicClick
Doll Armature Doll Joint Making Supplies
October 2023 by Antique Doll Collector magazine - Issuu
Wholesale OLYCRAFT 4 Sets Jeton Ball Socket Skeleton Joint White
Doll Armature Body Joint Skeleton Plastic Figure Movable Skeleton
Cloth Doll Making Supplies - eyes, needles, turning tubes
Doll Armature Assembly Pliers 3/16
Armature-Plastic-Per Foot-1/4 White
PLASTIC SKELETON/ARMATURE FOR dolls, toys & teddies 1/4 - per 30cm (1') $5.58 - PicClick
3/8 coil plastic ball and socket armature