Featuring a clamping-style lock, this mount securely holds the heaviest shoe units. It will not loosen up even under the most rigorous use, and a locating pin ensures that it won"t twist on the brackt. The bracket shoe mount attaches with the bracket"s mounting knob.Machined, solid aluminum construction. * Featuring a 1/4" standard tripod screw thread, you can fix it on the tripod or other brackets * The material is metal (Aluminum) * What can this item mount? A flash unit,a flash trigger ,a TTL cable hot shoe mount adapter. * Weight:0.7 ounce. Color: Black