Heavy Duty Materials: The Support Clamp is made of strong aluminum alloy, featuring a secure compact construction design that is corrosion-resistant and rust-proof. It is steady and durable for long-lasting use. Dimensions: Clamp: 1.65 x 1.3 x 2.36 inches (42 x 33 x 60 mm), weight: 2.7 oz (75 g); Freestanding Base: 7.87 x 1.97 x 0.24 inches (200 x 50 x 6 mm), weight: 6.1 oz (172 g). The base features a steady aluminum panel with non-slip rubber pads on the bottom. What You Received: Set of 2 Desktop Support Clamps — includes 2 clamps, 2 freestanding bases, 2 screws of 20 mm and 2 screws of 25 mm, 1 screwdriver, 4 clamp mats, and 4 fixed screws. The 20 mm and 25 mm screws accommodate acrylic panels and plexiglass shields with thicknesses ranging from 0.079 to 0.59 inches (2 mm to 15 mm). Simple Design & Easy Installation: These support clamps feature a bead-blasted finish for a clean, consistent appearance without color fading. They are easy to install and include a screwdriver for convenience.