The 13" Drill Rod is available with a threaded or hex end. Black pilot bits are needed for the hex end. Blue pilot bits are needed for the threaded end....
Hex Adapters The small hex hole saw adapter is needed to attach 11/16" (for 3/4" taps) and 7/8" (for 1" taps) hole saws to 13" drill rods that have a hex tip....