It's made of the wood enjoying high hardness and smooth surface. Specifications: 8 inches (full length: about 20cm/7.87in) Miniature, Lightweight For Portable But Ergonomically Designed For Gripping! Fixation Screw Can Firmly Locked, Stable Operation, Offer You A Sturdy And Efficient Job. Multipurpose: Fit For Amateur DIY And Pro Use And Mainly Used For Marking, Scribing, Laying Out Upon Various Jointery Or Other Woodwork. Description: Made of the wood high hardness and smooth surface. Dual adjustable hardened pins for marking both sides of a mortise Single pin on reverse side for use as a standard marking gauge Brass thumbscrew locking mechanism Used for marking straightened lines on wood Specification: Material: Wood, Brass Color: As Pictures Show Size: Approx. 20x 7x 7cm/ 7.87x 2.76x 2.76inch Package Includes: 1 Piece Wood Marking Gauge Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test.