These will allow you to use the 1.0 style of JoyToy Shoulders as well as the 3D printed shoulders I make with JoyToy 2.0 figures. The adapter will insert the peg to the hole on the shoulder, the figures arm is removed (use a hair dryer or hot water to help if needed) and then the circle slips on the arm peg. The arm is then pushed back in to the socket. 
The adapter works for most figures - all normal marines and Gravis have this connector. This will not work for Terminator marines. Please contact me if you need help to see if it compatible with your figure.
Item comes with:
- Qty 1 shoulder connector printed in a gray color
The shoulder pad and figure shown are for reference only and are not included. The item is not primed or painted.