Feature A 1/4" & 3/8" Threaded Interface for Binoculars, Rangefinders & Spotting Scopes, Plus M5 Expansion Points A Arca Quick-Release System w/ Integrated Bubble Level & Dual-Sided mm/inch Scales for Precise Alignment A 6061-T6 Aluminum Alloy with Anodized Finish for Rugged Durability and Corrosion Resistance A Equipped with 401 Stainless Steel Screws for Secure Mounting and Improved Long-Term Reliability A Lightweight 270g / 9.52oz Low-Profile 300x;38mm / 11.81x;1.50in Design for Easy Carry and Stable Mounting A Extended Rail Design Supports Simultaneous Mounting of At Least Two Devices for Flexible Dual-Use Applications Specification Specification Details Length: 300 mm / 11.8 in Width: 38.5 mm / 1.50 in Thickness: 16.3 mm / 0.64 in Weight: 270 g / 9.52 oz Material: 6061-T6 Alluminum Alloy Thread Size: 1/4 Screw Size: 3/8 Items in the Package: T15 Torx Wrenches, etc Size