The Leofoto STB-75 Rapid Lever-Lock Rifle Ball Head is machined from solid aircraft grade aluminum and hard anodized for the optimal strength and durability. The STB-75 is designed to be used with 75mm compatible tripod platforms for fast installation. It features a rapid locking lever-release clamp as well as a lever controlled ball lock. The clamp is a hybrid dual clamp that accepts both pictatinny as well as arca-type rails. The STB-75 has an integrated 75mm bowl and cannot be used as a normal ball head and is not compatible with 3/8" mounting studs and can only be placed into a 75mm tripod platform.