1Application Range: The self centering dowel jig is suitable for wood thicknesses ranging from 0.4 to 2.4 inch, providing perfect fit for both thin veneers and thick boards. Suitable for drilling straight holes, its wide adjustment range ensures adaptability to different projects 2Drill Bit Adaptability: This locating guide dowel jig can adapt to various drill bit sizes, including 1/4 inch, 3/8 inch, 5/16 inch, 7/16 inch, and 1/2 inch, simplifying your workflow and saving you time and energy on each project. 32 Sleeve Options: Equipped with 2 thread replaceable drill sleeves and 2 fixed drill sleeves, you can freely customize the settings of any project, whether you need stability or flexibility, this locating dowel jig can meet your needs. 4Easy Alignment: This doweling jig has center line on both the side and front, making it easy to achieve accurate alignment without worrying about bent holes or misaligned seams. Its user friendly design ensures stable use for both beginners and carpenters. 56 Drill Bushings: Equipped with 6 drill bushings, 2pcs each for 1/4 inch, 5/16 inch, and 3/8 inch, to meet different usage needs, providing convenient and efficient work, suitable for various installation and woodworking projects. 1 x WoodworkingJig 6 x Accessories 1 x User Manual