Features: Brand new and high quality The 4-Way Pressure Release Clamp – Wood Panel Corner Clamping System Woodworking Bracket Set handles stocking up to 6 inches (15.2cm) thick for simplifying the processes of countertops, furniture panel Stock stay flat and prevents buckling of board because of the equally apply pressure from all four directions More convenient than lining up standard clamps and cauls; Attach notched bar to any length 1.5inchx1.75inch (3.2x4.4cm) board (equivalent to a 2x4 in half) with provided screws, set clamp and turn handle to tighten. Make sure the 2x4s you use not twist; Drill pilot holes for the outer-most screws when attaching the pressure pad Build any length clamp with the plastic bar with 12 notches for adjustability to handle a variety of stock widths; Turn the handle to tighten the clamp and unwinded the handle to release pressure; Clamp have pressure pad to prevent damage of your stock Package includes 2x 12.75inch long notches bar, 2x 6.9inch long notches bar, 1x clamp assembly head, 1x clamp assembly tail, 16x assembly screws (4x 3/8inch, 12x 1-1/4inch L), and assembly instructions; 1 set with 1 clamp; Wood required, not included Specifications: Material:Metal Package Includes: 1 Set Pressure Release Clamp note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.