Foto4easy 501PL Sliding Quick Release Plate QR For Manfrotto 501 503HDV 701HDV MH055M0-Q5 The Quick Release Plate is replacement for Manfrotto 501PL It comes supplied with one 1/4"-20 and one 3/8" camera screw each, and features a location (video) pin Precisely engineered, black anodized, sealing it against corrosion and abrasion Compatible with Manfrotto heads that use the RC5 quick release system (501, 503 & 701 NG Heads) Compatiable With: 701HDV 501HDV 503HDV MH055M0-Q5; Replaces old part #3433PL