Precise and Stable Marking: Crafted from medium carbon steel with a rotating hinge design, this compass offers smooth, one-finger operation. Flat Leg Design for Leatherwork: The specially designed flat legs allow the tool to sit flush against the edge of your leather for setting stitch lines (edge distance), measuring thickness. Adjustable: This leather compass Features a wide measuring range of up to 100mm (approx. 4 inches) to meet various DIY needs. Wide Application: This stitching groover tool is suitable for leather edge scoring, length comparison, size marking, and mechanical marking, widely used in DIY leather sewing, leathercraft production, and basic mechanical operations. Ergonomic and Easy to Use: The lightweight body (approx. 86g) reduces hand fatigue during long working sessions. The smooth adjustment screw allows you to lock the width securely, ensuring consistent markings across your entire project.