3½" Countersink Drill Bit - a new way to set recessed Berntsen 3½" diameter concrete markers
"The countersink drill bit we purchased to install Berntsen concrete markers works PERFECTLY! We scheduled 2 days labor and ended up only using about 5 hours. It's very handy, still in great shape and paid for itself the first time we used it." - Jake Teegarden, Vasconcelles Engineering Corp., Springfield, IL
The C35DRLM countersink drill bit is specially designed to install Berntsen 3½" "C" style concrete markers in asphalt or concrete. Use the C35DRLM to ream the proper counter sink depth, then use a 1" bit to expand the hole for the marker stem (item # SM-420-420 sold separately) for a neat looking, long-lasting recessed monument.
- For SDS-Max rotary hammer drills only
- This drill bit countersinks the top of the marker only (not the stem). We suggest a 7/8" or 1" drill bit to create the stem hole (item # SM-420-420 sold separately)
- Three-piece design - No longer necessary to replace entire bit when one section wears out