Haoge 220mm Multi-purpose Long Quick Release Extender Rail Sliding Plate for Camera Tripod Ballhead Clamp fit Benro Arca Swiss Sunwayfoto The Haoge HQR-220 universal quick release long plate is an Arca-type compatible multi-purpose rail with a laser-engraved reference scale with 1mm increments on both sides. It allowing for easy nodal point adjustments. There are four holes at the ends of the plate for DIY L Plate or building other support systems. Dual dovetail design, both sides can be mounted equipments. Compatible with a variety of digital cameras. Two safety stop screws in both side to prevent drop of camera by accident.