CMR Measuring Rulers
 A versatile tool for fast and accurate one-person measuring, the CMR 25 is the tool for measuring heights, clearances, and horizontal distances up to twenty five (25) feet. Made of rugged, non-conductive fiberglass, the CMR 25 is lightweight and designed for strength.
 
• Available in 25 ft., 36 ft., and 50 ft.
• Dual measuring scales: English & Metric
• English scale in ¼ inch increments
• Metric scale in ½ centimeter increments
• ¼-20 female threaded tip for accessories
• Positive snap-lock buttons
• Direct reading at eye level
• No tapes to break or wear
 
The CMR is made of rugged non-conductive fiberglass.  (NOTE:  these measuring rulers are not electrically tested as live line tools)
The Crain Measuring Ruler (CMR) is used for measuring heights, such as overhead clearances, heights of trees, beams of ceilings, etc.
The CMR is a dual scaled measuring ruler.
    • English scale in 1/4" increments on one side
          • Metric scale in 1/4" increments on the other side.
There is a 1/4 x 20 female adapter in the top section and can be used to attach accessories.  A 5/8 x 11 adapter is available for purchase separately.
CMR does accurate one-person measuring of heights.  To extend the rod, extend one section at a time, starting with the smallest section, and keep extending until you get to the point you want to measure.  The measurement is read at the top of the next largest unextended section.
The CMR (which is round in shape) is read directly at eye level, no adding or subtracting the outside section like some other measuring rulers. There are also no tapes to wear or break.
To disassemble the CMR, start by taking screws out of the base section.  Then let the other sections slide down through the bottom of the outside section.  At the next section, you will need to punch the pins through and pull out the plug (NOTE:  the plug is spring loaded and could pop you eye).  Proceed the the next section the same way.