Made of stainless steel and zinc alloy, sturdy and durable. 1/4 mounting screws with D-Ring, can be tightened by metal coin or screwdriver Please confirm if the screw is compatible with your camera or front quick release tripod to buy They have 2 clamping systems: a hole for an allen key, and a small swivel buckle If you want the other products on camera accessories, enter SMALLRIG and search for more than 300 professional items Product Description Sturdy and Durable Made of stainless steel and zinc alloy, sturdy and durable. 1/4 mounting screws, with D-Ring, can be tightened by coin or screwdriver. Product Information Compatibility: Plate QR. Package includes: 5 x 1/4" Screws. Product dimensions: 14.5x14x6.23mm. Net weight: 27g Material: Stainless steel.