The Ray-Ban RX6437 prescription frame pairs a square metal front with 140mm metal arms, and this aftermarket set is built to that same length and straight-edged profile so the hinge seats correctly against the front. All-metal eyeglass frames at this size are common across several Ray-Ban lines, so matching the exact model code matters more than just picking 'square metal, 140mm.'

Square metal eyeglass frames like the 6437 tend to hold their shape well over time, with wear concentrated almost entirely at the hinge screw rather than along the arm. If the temples have started drooping or won't stay open at a consistent angle, that's the screw working loose — a straightforward fix before it's worth replacing the arm. Catching it at the drooping stage, rather than after the screw has stripped completely, usually means a simple tightening is all that's needed.