PANEL GLUE-UPS: The 4-Way Pressure Release Clamp – Wood Panel Corner Clamping System Woodworking Bracket Set handles stock up to 6 inches (15.2cm) thick for simplifying the process of gluing table tops, countertops, furniture panels, cabinet doors, and more and saves you from using additional clamps to keep the glue-ups straight. EASY TO USE: Assembly instructions included; More convenient than lining up standard clamps and cauls; Attach notched bars to any length 1.5-inch x 1.75-inch (3.2cm x 4.4cm) board (equivalent to a 2x4 ripped in half) with provided screws, set clamp and turn handle to tighten (on large pieces, we recommend one clamp every 18 inches/45.7cm for maximum clamping efficiency); Make sure the 2x4s you use are not twisted; Drill pilot holes for the outer-most screws when attaching the pressure pads. 4-WAY: Stock stays flat and prevents buckling of boards during glue-up because of the equally applied pressure from all four directions (top, bottom, and both sides); Ideal for gluing table tops, shelving, veneer, laminates; Durable clamp only limited by the quality of prep and glue used. ADJUSTS TO YOUR PROJECT: Build any length clamp with the durable plastic bars with 12 notches for maximum adjustability to handle a variety of stock widths; Clamp can be used for boards up to 6 inches in thickness by simply adjusting the clamp width capacity with the appropriate number of notches; Turn the handle to tighten the clamp and unwind the turn handle to release pressure; Clamp has pressure pads to prevent damage to the edge of your stock. CONTENTS: Package includes (2) 12.75-inch long notch bars, (2) 6.9-inch long notch bars, (1) clamp assembly head, (1) clamp assembly tail, (16) assembly screws (4x 3/8-inch, 12x 1-1/4-inch L), and assembly instructions; 1 set with 1 clamp (multiples needed for projects over approximately 2 feet/61cm)., Weight: 4.10721194106 Pounds, Manufacturer: NTLToolworks