Made of stainless steel and zinc alloy, sturdy and durable. 1/4" Mounting Screws, with D-Ring, They can be tightened by a metal coin or screwdriver Please confirm if the screw is compatible with your camera or the Quick Tray Tripod before purchasing They have 2 tightening systems: a hole for an allen wrench, and a small swivel buckle If you want other products on camera accessories, enter SMALLRIG and search for more than 300 professional items Robust and Durable Made of stainless steel and zinc alloy, sturdy and durable. The 1/4" fixing screws, with D-Ring, they can be tightened by a metal coin or a screwdriver. Information about this product Compatibility: QR plate. Package Includes: 5 x 1/4" Screws. Product Dimensions: 14.5x14x6.23mm. Net Weight: 27g Material: Stainless Steel.