The Leofoto STB-75X Rapid Lever-Lock Rifle Ball Head is machined from solid aircraft grade aluminum and hard anodized for the optimal strength and durability. The STB-75X is designed to be used with 75mm compatible systematic tripod apexes. It features a redesigned lever-release clamp as well as a lever controlled ball lock which creates an extremely low-profile setup. The STB-75X has an integrated 75mm sized systematic adapter and cannot be used as a normal ball head and is not compatible with 3/8" mounting studs. This product can only be placed into a 75mm systematic tripod apex. Two versions are available: one with a dual Arca and Picatinny clamp, and another with Arca only. Please select the option that best suits your needs. Leofoto STB-75X Rapid Lever-Lock Rifle Ball Head w/75mm Systematic Adapter STB-75X-ARCA in Black