The Manfrotto MSQ6 Quick Release Adapter with Plate is a replacement or upgrade part that allows you to fit any existing 050 or 468 series Manfrotto tripod head with the Q6 Top Lock system. The included Arca Swiss compatible plate clicks into the base from above, triggering a pin that keeps the plate from sliding out even before it's tightened down. Three built-in bubble levels ensure accurate framing and composition. The MSQ6 is compatible with the included Manfrotto MSQ6PL camera plate and Arca Swiss brand plates but is not guaranteed to work with "Arca-type" plates from other manufacturers.