Drop in, Click and Lock Wiggle-free, low-profile quick release system Both 1/4"-20 and 3/8"-16 mounting options Spring-loaded ball bearings in center provide a secure fit Durable stainless steel and magnesium alloy Designed and manufactured to the most exacting standards, Seastars Q1 provides a level of precision engineering, durability and reliability. With it's rapid release effortlessly move your rig from tripod, to slider, to crane, to monopod and back again. This is the perfect answer for studio and location shoots. Made from hardened stainless steel to ensure long life and total dependability. The low centre of gravity and solid locking system provides a wriggle free experience.