The RX3916V Clubmaster Square pairs a squared acetate front with a 145mm temple arm, sized to this model specifically rather than the rounder Clubmaster variants also sold under a similar name. A compatible arm needs to match that squared profile as well as the length to sit flush at the hinge.

A hairline crack around the hinge screw is the typical failure point on acetate temples like this one, showing up well before the squared front takes any visible damage. Once that crack starts, the arm tends to snap fully with continued use, so it's worth replacing at the first sign rather than waiting. A compatible 145mm aftermarket arm resolves it cleanly without any work needed on the front. Confirming the squared profile against the frame before ordering avoids ending up with an arm meant for the rounder Clubmaster variants instead.

Frequently asked questions

Do I need a specific screwdriver to attach these myself?

You'll need a small eyeglass screwdriver, typically included in basic repair kits, to remove the old hinge screw and attach the new 145mm arm to your 3916 frame — the whole swap usually takes under five minutes.

Are these official Ray-Ban replacement parts?

These are compatible aftermarket arms, independently produced to match the 3916's hinge and 145mm length. They aren't manufactured or supplied by Ray-Ban, just built to the same measurements so they attach correctly.

Is it worth buying new arms instead of a whole new frame?

Replacing both arms on the 3916 costs from €26.95 with free worldwide shipping, far less than a new frame, and it's backed by a 3-year warranty against manufacturing defects on the 145mm hardware itself.

Can I replace just one arm, or do I have to buy both?

You can order a single side if only one arm on your 3916 is broken or scratched, or buy the pair if both need replacing — either way they match the 145mm length exactly.