The Really Right Stuff Series 2 Tripod Threaded Leg Collar RRS-9000418 transforms your tripod into a versatile powerhouse by allowing the attachment of peripheral equipment such as mobile phones, tablets, and other accessories. Constructed from 6061-T6 aluminum with a black anodized finish, it features dual 1/4"-20 threaded accessory mounts and a 3/8"-16 mounting socket. The anti-twist slot ensures secure and stable mounting, making it an indispensable accessory for photographers and videographers seeking to expand their tripod's functionality. Really Right Stuff Series 2 Tripod Threaded Leg Collar RRS-9000418 in Black