RAM® Low-Profile Tough-Claw™ 小型クランプマウント

The clamp tightened perfectly onto my boat's uneven railing, a spot where every other mount failed. The range of sizes it handles from 0.6 to 1.1 inches is exactly what I needed. Solid and secure, no wobble at all.

Finally found a mount that actually fits my oddly-shaped aluminum railing without any wobble. The clamp's adjustment range handles the ⅞-inch bar perfectly, and the whole setup feels rock solid.

I was skeptical about how it'd hold on an odd-shaped rail, but the claw's grip is rock solid even after a bumpy ride. The fact that it fits anything from .625" to 1.14" means I've already moved it between two different bars without a fuss.