The Intercomp Coil Spring Tester is portable, gives digital force / travel indication and is 9v battery powered.Portable tester provides digital force / travel indicationLarge 0.5" display for accurate readingsKnurled pressure relief knob and peak hold featureHigh accuracy splits and enhance chassis tuningQuick, single pin, vertical adjustmentThe Intercomp Coil Spring Tester features a large 0.5" display, knurled pressure relief knob and peak hold feature. Stop guessing, now you can pinpoint spring rates to determine high accuracy splits and enhance chassis tuning.Quick, single pin, vertical adjustment allows almost any spring to be rated. Handles flat/coil over springs up to 6"/150mm in diameter by 18"/457mm high, optionally to 30"/760 mm. Readout is in 1lb/kg increments.Accuracy: +/- 0.25%Capacity Range: 0-5,000lb/2500kg or 0-2000lb/1000kgTravel: 4"/100mm