1、UNIVERSAL ASSEMBLY: Self centering pin clamps are suitable for wood thicknesses from 0.4in to 2.4in. Whether using thin veneers or thick planks, dowel drilling fixtures provide a perfect fit. The wide range of adjustments ensure the adaptability of different projects. However, you should be noted that the fixture is only suitable for drilling straight holes 2、BIT ADAPTABILITY: The dowel guide jig can be adapted to a variety of bit sizes, including 6‑8‑10‑11‑12MM. With this comprehensive range, you will never have to search for the right drill bit. Simplify your workflow and save you time and effort on each project 3、TWO CASING OPTIONS: With two threaded replaceable casing and two fixed casing, you are free to customize the setup for any project. Whether you need stability or flexibility, the doweling pin jig put the power in your hands 4、EASY ALIGNMENT: Dowel fixtures have center lines on both sides and fronts, making accurate alignment a snap. No more worrying about bent holes or misplaced seams, and you get a seamless, professional result every time. The user friendly design ensure smooth operating for both beginners and experienced woodworkers 5、RUGGED AND LONG LASTING: The doweling pin fixture is long lasting enough to handle even the toughest drilling tasks. Equipped with six casings, can withstand the rigors of everyday use. You can believe to deliver accuracy and reliability, project after project