Feature: 1. [Versatile Dowel Jig] Our self centering dowel jig is suitable for wood thickness ranging from 0.4 to 6.7 inch, providing a perfect fit for various projects, whether using veneer or thick boards. 2. [Compatible Drill Sizes] The dowel jig drill guide can accommodate a range of drill bit sizes, including 1/4in, 3/8in, 5/16in, 7/16in, and 1/2in, simplifying your workflow and saving time and effort. 3. [Dual Bushing Options] Comes with two interchangeable threaded drill bushings and two fixed drill bushings for customization. Whether you need stability or flexibility, our dowel jig puts the power in your hands. 4. [Easy Alignment] Featuring centerlines on both the side and front, our doweling jig enables accurate alignment effortlessly, eliminating worries about bent holes or misaligned joints, providing seamless and professional results. 5. [Sturdy and Reliable] Made of aluminum alloy, our jig is built to withstand even the toughest drilling tasks, comes with 6 bushings, ensuring durability and accuracy for daily woodworking demands. Specification: Item Type: Self Centering Dowel Jig Material: Aluminum Alloy Adapted Drill Bit Size: Approx. 6.35mm / 1/4in, 9.53mm / 3/8in, 7.94mm / 5/16in, 11.11mm / 7/16in, 12.7mm / 1/2in. Package List: 1 x Self Centering Dowel Jig 6 x Accessories 1 x Instruction Manual