Heavy Duty Materials: The Support Clamp is made of Strong Aluminum Alloy, secure compact construction design with Corrosion-resistant and Rust-proof, Steady and Durable for long last. Dimension: Clamp: (1.65*1.3*2.36)inch / (42*33*60)mm, 2.7oz/75g; Freestanding Base: (7.87*1.97*0.24)inch / (200*50*6)mm - 6.1oz/172g (Steady and strong Aluminum Panel with non-slip sticky mats on bottom). What You Received: Set of 2 Pack Desktop Support Clamp: 2Pcs clamp + 2Pcs Freestanding Base + 2Pcs 20mm and 2Pcs 25mm screws + 1Pcs screwdriver + 4Pcs clamp mat + 4Pcs fixed screws. 20mm and 25mm Screws make clamp for (0.079" to 0.59") / (2mm-15mm) thick Acrylic Panels, Plexiglass Shield. Simple Looking & Easy To Apply: These Support clamp have been Bead Blasted Finish, awesome looking without color fading worries. Easy to apply, come with a screwdrive for convenient Install. Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you