Features - Made of impact resistant plastic. Capable of making edge-to-edge, T-shaped and edge-to-corner joints, ideal for wood drilling and wood joint repair.QUICK POSITIONING - Quick pin clamps automatically center on the board to position joints quickly and accurately.Adjustable Position The position of the baffle can be adjusted as needed. Adjustment range 0-50mm, suitable for 6/8/10mm drill bits. Thick - Can be used on cards up to 31mm thick and cards up to 1-1/4 thick.Widely used - for woodworking drilling, suitable for most woodworking hand drills and electric drills.Specification:Material: plastic + yellow metal Usage: wood drill Drill brush: 6/8/10mm Hole Punch Size: 200mm*70mm*65mm how to use:1. Adjust the positioning scale to determine the distance from the first hole to the edge of the board.2. After fixing the position, select a drill bit that matches the drill sleeve and start drilling.3. After drilling three holes, remove the nuts from the scale.4. Secure the hole to the third hole with a dowel (make sure the distance between each hole is the same).5. Drill all holes straight.content:1 x woodworking jig 3 drill bits (6/8/10 mm) 3 limit rings 1 x wrench