Designed for engineers and surveyors who prefer a 4-arm reel Chrome Clad and yellow clad blade 1/4"/6mm wide and .016" thick Subdivided line removes easily from reel Long, easy-action winding handle that locks line in any position Reel is nickel plated, 4-arm with rollers in each arm for smooth winding Open design construction aids in drying line and clearing out dirt Pair of 580 finger rings, a 579 engineers conversion rule are furnished Reel available separately Blade style: E1