【Perfect for Panel Furniture】 Our Dowel Jig is designed specifically for drilling and wood board joints, making it the ideal tool for panel furniture. 【Adjustable and Versatile】With a clamping capacity of 3/8" to 6.7", our jig is easy to adjust and can be clamped onto boards of different thicknesses, making it a versatile tool for all your woodworking needs. 【Precise and Secure】Our self-centering jig features a steel block and clamping screw handle that securely tighten the tools like a vise, providing uniform and stable clamping pressure for clamping the workpiece. 【Durable and Reliable】The rugged aluminum sides of our jig securely hold the work without damaging the wood, ensuring that it will last for years to come. 【Multiple Applications】Our jig features 4 holes along the top, with 2 of the holes accepting threaded bushings that can be replaced with sizes 1/4", 3/8", and 5/16", and the other 2 holes accepting 7/16" and 1/2" drill bits, making it a versatile tool for a wide range of woodworking projects. 【BLEKOO SERVICE】If you find any problems when you use them, feel free to contact us. We would try our best to assist you and ensure your satisfaction. BLEKOO 6.7 inch Self Centering Doweling Jig Kit, Drill Jig For Straight Holes Biscuit Joiner Set With 6 Drill Guide Bushings, Adjustable Width Drilling Guide Power Tool Accessory Jigs (Blue)