Features: Precision-Parallelogram Design: Engineered with an innovative parallelogram mechanism that guarantees accurate center alignment every time. Effortless Mortise & Tenon Centering Eliminates guesswork for woodworking joints: The precision-machined parallel arms adjust seamlessly to material thickness, positioning the marking bar at the exact midpoint. Simply scribe both sides of the bar for flawlessly centered linesInstant Center Line Marking: Place the gauge on any wood edge, squeeze the sides, and let the self-centering bar instantly reveal the midpoint. Ideal for marking center lines on boards, dowels, or sticks with unmatched speed and accuracyVersatile Workshop Companion: Perfect for plate grooving, pin joints, assembly alignment, drilling reference lines, mortises, rabbets, and more. Crafted from durable stainless steel, this tool withstands heavy use while maintaining precision Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementMaterial: Aluminum + Stainless SteelWeight: 420g-450gProduct size: 10x15cmPackage List:1 Set Center Gauge