Available from Aldon Company, Inc.
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Item #: 4024-03

◾ Measure track curvature or visually judge the straightness of
straight rail.
◾ Steel paddles lock to rail head. The custom 12" ruler measures
the space between the rail head and the red-marked midpoint
of a 62 ft. cord.
◾ Each inch of space between rail and string equal one degree of
curvature. Accuracy of measurement is +/-4%.

Other subsidiary measuring points can be color-dotted on the 62 foot cord. By color-dotting, two different overall distances can be provided in one length of cord, each with its own mid-point. The string reel has a lockable payout/retrieval latch to lock string at any desired point.

Weight 5 lbs.

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