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: Compatible with drill bits of 6mm, 8mm, and 10mm diameters. Allows precise line marking at various intervals. Durable, accurate, and portable: The 2-in-1 straight hole finder is constructed from ABS engineering plastic. Drill ring and stop collar are made of alloy steel for durability and precision. Adjustable: Position can be adjusted via screws to accommodate different requirements. Suitable for both professional carpenters and DIY enthusiasts. High efficiency: Helps prevent deviation during drilling when using a hand drill, ensuring accurate hole placement. Enables right-angle drilling, ideal for less experienced users. Great gift idea.