20-Pack 5-1/2-Inch Wet Diamond Core Drill Bits for Cutting Concrete and Asphalt, Super Plus Quality, 5-1/2" Diameter x 17" Length

The Super-Plus quality wet diamond core bits offers the best lifetime available on market Laser wielded Segment height 0.400” Length: 17” long to produce 13-1/2” core 1-1/4-7 thread