SMALLRIG DSLR Camcorder Safety NATO Rail 150mm Long with 1/4''-20 Mounting Holes for NATO Handles/NATO Clamp/NATO Accessories - 1500 This safety rail includes an array of 1/4'' mounting holes. It works with NATO handles or other accessories with NATO clamps. Length: 150mm (about 6") High quality CNC machining and anodized for durability. Material: Aluminum Alloy