The Really Right Stuff Small Bi-directional Plate is precision machined from solid 6061-T6 aluminum. Designed to offer a more generic interface for products that have not yet had a custom mount made, yet still fully compatible with any Really Right Stuff Dovetail style quick-release system. All of the quick-release plates utilize a custom machined 1/4"-20 threaded, captive-style mounting screw that threads into the tripod mounting socket of your equipment.FeaturesCNC machined 6061-T6 AluminumType II black anodized Repositionable for better fitCork pad to help prevent twistingDual mounting options: one center socket, one off-set slot