Multi-use: Self-centering dowel jig kit, a joinery system that combines marking and punching. It can be used as a self-centering dowel jig for drilling holes and as a center scriber for marking. Accurate measurement: Drill bit diameters are 6mm, 8mm, and 10mm, allowing precise line marking at various intervals. Durable, accurate, and portable: The 2-in-1 straight hole finder is constructed from ABS engineering plastic. The drill ring and stop collar are made of alloy steel for durability and precision. Adjustable design: Position can be adjusted via screws to accommodate different requirements. Suitable for both professional carpenters and DIY enthusiasts. High efficiency: Helps achieve accurate drilling placement, preventing deviation when using a hand drill. Enables right-angle drilling, ideal for users of all skill levels. Great gift choice.