Berntsen 2.5" Aluminum Concrete Survey Marker
Berntsen "C" style (US Army Corps of Engineers Type 1 Disc) has the classic 3" (76mm) long split-style tapered stem. It is available in 2½" (89mm) diameter and one piece orbital formed from solid 6000 series aluminum bar.
The CAPMAG ceramic magnet can be used with concrete markers to assure easy detection of the mark by a magnetic locator. Dimensions are 1/2" (13 mm) in diameter & 1/4" (6 mm) long. Can be located up to four feet deep with a magnetic locator.
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Preview
A = 2 1/2" (64 mm)
B = 23/32" (18 mm)
C = 3 5/16" (84 mm)
D = 7/8" (22 mm)
Countersink Drill Bit Video for Berntsen Concrete Markers