Description: 【Packaging List】1x Self Centering Drill Guide for Straight Holes, 3x Drill Bit (1/4", 5/16", 3/8", including limit ring and wrench), 3x Drill Bushing (1/4", 5 /16", 3/8") 【Sturdy Material】Dowel Jig Set, made of aluminum alloy material, has fine workmanship, is sturdy, and can be used for a long time. 【High Accuracy】Woodworking Tools are specially designed for accurate positioning when drilling holes on the side of wooden boards. They have good verticality, higher drilling accuracy, and are widely used. 【Adjustable】With the Dowelling jig set, you can adjust the position of the two feet according to the thickness of the board. The distance between the roller clamp feet is adjustable in three levels, making it easy to use. 【Function】Woodworking Guide has an scale marking function, which can both scribe and punch holes. It is multifunctional and has high work efficiency. Specification: Material: aluminum alloy Size Chart: 14cmx4cm/5.51inchx1.57inch Package Includes: 1x Drill Guide for Straight Holes 3x drill bit (1/4", 5/16", 3/8", including limit ring and wrench) 3x drill sleeves (1/4", 5/16", 3/8") Note: Please allow slightly errors 1-2cm differences due to manual measurement.