3-1/2" Diameter Extendable High Performance Wet Core Drill Bit, 14" Drill Head + 2pc 12" Tubing Extension, Wet Only, 1-1/4"-7 Arbor

High performance wet core drill bits with increased diamond quality and even more optimized bonding to achieve high drilling speed with smooth operating experience. Best performance during drilling medium hardness concrete and rebar reinforcements. Extendable by attachable tubing that increases barrel length. Each drill head is 14" long, and each extension tubing adds 12" to the total drilling depth. Not recommended to extend past 50 inches in total length. 10mm segment height with 1-1/4"-7 threaded arbor. Use wet only with handheld core drills or core drill rigs.