Description: 100% brand new and high quality Features: Made of High-quality aluminum alloy material which is strong clamping force, rust and wear resistance. Rotatable knob is used to adjust the height and stabilize the inherent force. Easy to carry, install and use to ensure good performance and increase efficiency. Widely used in many wood and metal working applications for holding, positioning and fixing workpieces, It is ideal to clamp devices and fixtures. Two types of sliders can fulfil different work requirements which is includes:20 ,19 . Specifications: Material: Aluminum Alloy Dimension:Approx. 80.24x68.45mm/3.15x2.69inches Net Weight: Approx.80g Color:Blue/Red Compatibility:19 /20 Note: Please allow 1-2mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 x Woodworking Platen