Contour Gauge Scribe Tool, Precise Profile Duplicator For Woodworking, Van Conversion Projects/Construction Carpenter/Panel/Tiles And Laminate. Specifiaction: Material: Iron, ABS. Size: 23.3 x 3.5cm/9.2 x 1.4inch. Length between pulleys: 2.7cm/1.1inch. Measurement Accuracy: 0.1. Batteries Included: No. Features: Quality and Durable Strong and sturdy. Easy to carry and store. Collet moves more in exchange for shaped ends The pen collet can move up and down in the middle. Take shape at both ends. There'sa pulley on one side and a pointer on the other. Applicatable  to more scenarios: Convenient and easy to use. USING STEPS: 1. Adjust the mouth tighten or loose to fix. 2. Choose the pulley end or pointer end the pencil. according to your need. 3. Scribe the profile shape on surface. 4. Fit perfect. Package included: 1 x Profile Scribing Ruler