Features: The autocentering doweling jig set with hardened stainless steel construction ensuring precise alignment for wood joints through its auto centering parallelogram mechanism and interchangeable metric drill guides (1/4",5/16",3/8"). Featuring double scale hardened steel scribing rods and ±0.1mm tolerance markings, this multiple diameter woodworking tool achieves flawlessly center positioning for drilling and layout tasks across various wood thicknesses. Ideal for professional carpenters, furniture makers, and serious DIYer enthusiasts requiring reliable joint alignment in cabinetry, door framing, and decorative woodcraft projects. Perfect for creating mortise and tenon joints, shelf pin holes, or drawer slide installations where symmetrical center marking and drill bit guidance are critical for structural integrity. Engineered with wear resistant stainless steel components, this marking gauge maintains consistent accuracy through repeated use in workshop environment, combining industrial durability with precise woodworking functionality. Specifications: Component:aluminium alloy Size: Approx.15x10cm/5.9x3.9inch Automatic centering parallelogram mechanism Measuring tolerance: ±0.1mm Package Includes: 1 Set Doweling Jig note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.