CAMVATE Slide-In QR Adapter Baseplate for Manfrotto 577/ 501/504/701 Tripod For Use with Manfrotto Sliding QR Plate, Numerous 1/4"-20 & 3/8"-16 Mount Threads, Anti-Fall Captive Screw, Anodized Aluminum Alloy TRIPODS VIDEO PROF-Quick Release Assemblies