Heavy Duty & Suit for: The Support Clamp made of Strong Aluminum Alloy, secure compact construction design with Corrosion-resistant and Rust-proof, Steady and Durable for long last. Adjustable desk partition clamps are designed to mount onto any desk, counter or table. Thick range: (0.67"-2") / (1.7cm-5.1cm). Dimension: Clamp: (1.65*1.3*2.36)inch / (42*33*60)mm, 2.7oz/75g; C-shap Base: (2.05*2.05*3.62)inch / (52*52*92)mm, 7.8oz/222g, Steady and strong, there are two non-slip rubber mats on table contacting surface for more stable and no desk-damged clamp. What You Received: 4 Pack Desktop Support Clamp: 4Pcs clamp + 4Pcs C-shap clamp Base + 4Pcs 20mm and 4Pcs 25mm screws + 1Pcs screwdriver + 8Pcs shield clamp mat. 20mm and 25mm Screws make clamp for (0.079" to 0.59") / (2mm-15mm) thick Acrylic Panels, Plexiglass Shield. Simple Looking & Easy To Apply: The Support clamp have been Bead Blasted Finish.Awesome looking without color fading worries. Easy to apply, come with a screwdrive for convenient Install. Lifetime Warranty: Aims for you satisfaction. Any questions & problems, please feel free to contact us for solutions. Sincerely Service for you.