DIAMOND PRODUCTS Shaft Extension Rods
Shaft Extensions easily attach to the core bit and allow for a deeper drilling capacity. Machined metal extensions that allow you to drill deeper than the normal core bit length. Various sizes and styles available.
Male 5/8″-11 thread to Female 5/8″-11″
Male 1-1/4″-7 thread to Female 1-1/4″-7 (1.250-7″)
Male 1 7/8-7″ thread to Female 1 7/8-7″ (1.785-7″)
Male NWJ thread to Female NWJ