Power! Estimator Software
  Measure plans the fast, accurate way with the Scalex PlanWheel™. Here's the perfect tool for taking scaled measurements from blueprints, maps and plans. Just select the built-in scale factor to match the plan and roll the PlanWheel. The measurement is displayed instantly.
  Scalex PlanWheel
Works with Power! Estimator™ software from Jaffe Software.
Easy-to-read liquid crystal display shows length, count and scale factor.
Built-in scales.
Built-in counter and constant adder on probe tip.
Measures in km, m, cm, feet, yards, miles and inches.
Selectable wheel sense; add, subtract, bi-directional.
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  Scalex PlanWheel Ready   Power! Estimator™ is SCALEX READY.