Precision Calibrated Sizing: Precisely fits 2.5/3/4mm 1x19 stainless rig wire with up to 800LB measuring range, equipped with detailed calibration reference chart for easy data lookup Battery-Free Reliable Design: Battery-free mechanical construction avoids electronic breakdown under wet, salt offshore conditions and delivers steady dial readings Robust Aluminum Construction: Built with high-strength aluminum body for long-term service across marine and offshore sailing settings Easy Single-Hand Operation: Ergonomic snap-on roller structure supports single-handed operation, compact size for convenient onboard carry and storage Wide Application Scenarios: Versatile for daily dock maintenance, new rig setup and pre-race fine tuning; great for private boat owners, casual hobbyists and small amateur sailing clubs ASIN B0GXYXNDM4 Model 90213061 Set Name PT-1 Brand Name MEKIBOT Unit Count 1 Count Part Number 90213061 Manufacturer MEKIBOT Material Type Aluminum Item Highlight Battery-Free Design for 2.5/3/4mm 1x19 Stainless Rig Wire, Stable Tension Readings, Aluminum Body, Ideal For Rig Maintenance Number of Items 1 Included Components PT-1 Sailboat Rigging Tension Gauge