Features: Precision-Parallelogram Design: Engineered with an innovative parallelogram mechanism that ensures accurate center alignment every time. Effortless Mortise & Tenon Centering: Eliminates guesswork for woodworking joints. The precision-machined parallel arms adjust smoothly to material thickness, positioning the marking bar at the exact midpoint. Simply scribe both sides of the bar for perfectly centered lines. Instant Center Line Marking: Place the gauge on any wood edge, squeeze the sides, and the self-centering bar instantly reveals the midpoint. Ideal for marking center lines on boards, dowels, or sticks with fast, reliable accuracy. Versatile Workshop Tool: Suitable for plate grooving, pin joints, assembly alignment, drilling reference lines, mortises, rabbets, and more. Constructed from durable stainless steel and aluminum for long-lasting performance and precision. Material: Aluminum + Stainless Steel Weight: 420g-450g Product Size: 10x15cm Package List: 1 Set Center Gauge