Taken from the RealmCrafter: Standard Documentation
Realm Crafter Actors (Monsters and Player Characters) have 20 bones. The more bones a model has the greater the impact on FPS it has.
Gubbins (Equipment, weapons, armor, beards, hair, etc) can be attached to 11 of these bones. These Gubbin attachment joints/bones MUST be named the following:
1. Head 2. Chest 3. R_Shoulder 4. L_Shoulder 5. Pelvis 6. R_Forearm 7. L_Forearm
8. R_Hand 9. L_Hand 10. R_Shin 11. L_Shin