2-in-1 Multifunctional: Not only is it a dowel clamp, you can use it as a self-centering dowel clamp for drilling and as a center point for marking. Woodworking system that combines marking and drilling. PRECISE POSITIONING: The dowel clamp kit provides different sizes of drill guides and drilling depth stop rings to ensure that the dowel holes are drilled at the correct angle and depth without deviation or deviation. Improve work efficiency: Positioning ensures precise alignment when drilling, allowing you to mark center lines on wood quickly and accurately. Both sides of the doweling jig have imperial marking functions, and the doweling jig and the center scriber are combined into one to improve work efficiency. Adjustable distance: The wooden doweling jig can be moved with screws, and the distance can be adjusted according to different thicknesses of plywood. The foot of the drilling tool can be adjusted to achieve rapid movement and continuous drilling by adjusting the screw.