Figure 2: (a) Two 0.6 mm diameter stainless steel (SS) wires having "Helical Stop (HS)" and a piece of 28 mm open‑coil‑spring. (b) Insert both guide wires (GW) (straight parts) through open‑coil‑spring from both sides (lumen opening) and pass them through the entire lumen coaxially. (c) 1st round engaging hook prepared in one of the guide wire. (d) 2nd round engaging hook prepared in another guide wire at the other end of spring. This will be the posterior side of open‑coil orthopedic traction spring, for engaging the posterior attachment hook on maxillary appliance. (e) Stretching apart of two terminal hooks results compression of open‑coil spring in between the two "HS", which confirms precise insertion of GW through "HS" of opposing GW. (f) Bigger engagement ring made from the thicker (0.8 mm) wire is attached to anterior spring end, which will be engaging horizontal arm of facemask