Customer Service
M-F 8:00am - 4:30pm CST

4" Countersink Drill Bit for Spline Rotary Hammer Drills

All prices USD
Availability: In Stock
Add To Field Bag


Product Details

4" Countersink Drill Bit
Save Time, Labor & Money Setting Berntsen 4" 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 C4DRLS countersink drill bit is used to install Berntsen 4" concrete markers in asphalt or concrete. Use the C4DRLS to ream the proper counter sink depth, then use a 1" bit to expand the hole for the marker stem

(item AE-505-145 sold separately)

for a neat looking, long-lasting recessed monument.
  • For spline chuck 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
  • Three-piece design - No longer necessary to replace entire bit when one section wears out
  • Berntsen recommends at least a 24-volt Rotary Hammer drill be used with these drill bits


Fits a Spline Chuck
For use with C4D & C4DB
Berntsen Concrete Markers

Pilot Bit - 5/8 x 4 3/4
Drill Depth 2 1/8

Customers who purchased C4DRLS also purchased:

1 - 24
25 - 99
100 - 249
250 or more
1 - 10
11 - 24
25 - 99
100 or more


Countersink Drill Bit Video for Berntsen Concrete Markers


Product Reviews

Berntsen International, Inc.
  • 1-800-518-0934
  • All other countries:
  • +1-608-249-8549
  • PO Box 8670
  • Madison, WI 53708-8670
We accept VISA, Master Card, American Express and Discover Card.