Rod Rigging Tension Gauge-04 to -10 - RT-10Loos rod tension gauges measure the tension in rods over a range of approximately 5% to 25% of the breaking strength of the rod and provide an accuracy of + or 5%. The "Professional Model" RT series provides an increasing durability, accuracy and convenience of use. Manufactured of rugged anodized aluminum, this gauge is corrosive resistant and will give years of service. Detailed operating instructions are included with each tension gauge. Operates