Item Type: 4 Way Pressure Clamp Material: Metal + ABS Colour: Black Uses: Apply pressure on the workpiece surface when edge clamping to prevent bending and buckling of large panels Package List 6 x Panel Clamp Bars 2 x Fixing Clamps 16 x Screws Manual measurement, there are errors. 1INCLUDED PARTS: 4 way pressure release clamp set, including 2pcs woodworking clamps and 6pcs panel notch bars for various woodworking projects. 24 WAY PRESSURE: Adjustable length clamps provide pressure from all 4 sides, very suitable for gluing large projects like table top and shelves. 3DRILLING SIZE: To make the wood chips, drill a series of 5/8in holes at 2in intervals below the center line of the deck of the 2x4 panel. 4EASY OPERATION: Attach notched bars to appropriate length board with provided screws, set clamp and turn handle, rotate notched plates away from each other. 5MAIN PURPOSE: Apply pressure on the workpiece surface when the edge is clamped to prevent bending and buckling of large panels.