Ray-Ban's 3597 Wings model uses a square metal front with 140mm arms, and this aftermarket pair reproduces that length and all-metal build so it hinges into the front the same way the factory temple did. The Wings line has a distinctive brow bar, but the arm attachment itself follows the same square-front hinge geometry as other metal Ray-Ban styles at this size, so the swap doesn't involve any unusual hardware.

Metal-on-metal hinges like this one are simple mechanically, but they rely entirely on the screw staying tight, since there's no plastic bushing to take up slack. If the arms start to droop or won't hold an angle, a small flathead screwdriver and a quarter-turn is usually the whole fix — no need to replace the arm itself unless it's actually bent or broken. Keeping a spare screw of the same small gauge on hand is a good habit, since these are easy to lose during a quick fix.