Features: Precision-Parallelogram Design: Engineered with an innovative parallelogram mechanism that ensures accurate center alignment every time. Effortless Mortise and 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 indicates the midpoint. Ideal for marking center lines on boards, dowels, or sticks with fast and reliable accuracy. Versatile Workshop Tool: Suitable for plate grooving, pin joints, assembly alignment, drilling reference lines, mortises, rabbets, and other woodworking tasks. Constructed from durable stainless steel and aluminum for long-lasting performance and consistent precision. Notice: 1. Actual color may vary slightly from the image due to lighting conditions. 2. Please allow 13 cm variation due to manual measurement. Material: Aluminum, Stainless Steel Weight: 420g450g Product Dimensions: 10 x 15 cm Package Includes: 1 Set Center Gauge