Hub Disc Survey Marker (100-Pack) GLM400CL No Load RPM: 0-900

No Load RPM: 0-900

With a three-inch compact size that easily clips on bags and belts

and a mounting bracket for easily attaching to grade rods

that cuts through mud and other materials on the invert of the pipe

Equipped with a unique pentaprism that allows surveyors for direct reading of the adjustable circular bubble

Hub Disc Survey Marker (100-Pack) GLM400CL No Load RPM: 0-900Hubdisc Survey Marker Discs are in packages of 100. Each Hubdisc is 1" in diameter and the nail hole is 1 8" in diameter. 40 mil. plastic, yellow one side, fluorescent orange other side Printed "SURVEY MARKER DO NOT REMOVE" For use with Hammerless Hub Stake and Mag or P. K. Nails