- Versatile Centerline Gauge: Compatible with 4", 6", and 8" calipers, this centerline gauge is ideal for dials, verniers, and digital calipers. It allows for precise measurement of centerline distances, making it essential for checking distances between holes or from holes to edges. - Effortless Accuracy: Eliminate guesswork with this gauge that provides direct readings of centerline measurements. No more complex calculations; simply read the numbers for accurate results, saving you time and increasing efficiency. - Quick Adaptability: Each pair of gauges easily fits most calipers and features a 60-degree cone probe that securely fits into holes. This design ensures reliable readings for center distances and hole edge measurements. - Durable Construction: Crafted from alloy steel hardened to 50 RC and finished with a black anodized coating, these gauges are designed for longevity. The precision-ground outer diameter and taper guarantee high accuracy in every measurement. Use Cases: 1. Metalworking: Perfect for machinists needing to measure hole placements for drilling or milling operations. 2. Woodworking: Ideal for carpenters ensuring precise spacing between dowel holes or hardware mounts. 3. Engineering: Essential for engineers who require exact measurements in design and assembly processes.