SM-76C Saddle Mount Rifle Adapter for Tripod Arca Swiss QR PlateSM 76C Arca Swiss Saddle, capable of supporting heavy equipment other than cameras to be mounted directly on Arca Swiss standard tripod. T6061 Aluminum main body material, elaborately CNC machined with Type III hard anodized finish ensures it's resistant to corrosion and abrasion; Ideal to work outdoors under extremely harsh environment. Base of the saddle is Arca standard QR plate to be mounted on Arca standard ballhead directly; Safety stop screws