Made of stainless steel and zinc alloy, sturdy and durable. 1/4-inch mounting screws with D-ring, can be tightened with a metal piece or screwdriver Please confirm if the screw is compatible with your camera or front quick-release tripod They have 2 tightening systems: a hole for an Allen wrench and a small rotating buckle If you want the other camera accessories products, enter SMALLRIG and search for more than 300 professional items Product Description Robust and durable Made of stainless steel and zinc alloy, sturdy and durable. 1/4" mounting screws, with D-ring, can with coin or screwdriver. Product Information Compatibility: QR plate. Package Includes: 5 x 1/4" Screws. Product dimensions: 14.5 x 14 x 6.23 mm. Net weight: 27 g Material: stainless steel.