If a temple on your Ray-Ban RB3916 Clubmaster Square has cracked at the hinge, the replacement needs to match two things: 145mm length and acetate construction, both of which this aftermarket pair follows. The 3916's squared-off take on the Clubmaster shape uses the same rectangular hinge mount as the rounder Clubmaster models, so length and material matter more here than the exact front shape.

As with other Clubmaster-style frames, the brow bar rivets up front are a separate wear point from the temple arms and won't be fixed by a new arm. What does wear on the arm itself is the acetate around the hinge screw, which can develop a hairline crack after enough folding cycles. If that's where the damage is and the front is otherwise sound, the arm is the only part that needs replacing.