SHDIATOOL 12 Inch Diamond Core Drill Bit Extension Rod, 1-1/4"-7 UNC Male to Female Thread, Core Drill Extension for Concrete Brick Stone, Hollow Shaft for Wet Drilling

【UNIVERSAL 1-1/4"-7 UNC COMPATIBILITY】 Designed with standard 1-1/4"-7 male to 1-1/4"-7 female thread, this extension rod fits most professional diamond core drill bits and drilling machines. Perfect for extending reach without compatibility concerns 【EXTEND DRILLING DEPTH UP TO 12 INCHES】 Easily extend your core drill bits to reach deeper holes in concrete, brick, stone, and masonry. Ideal for plumbing, HVAC, and construction jobs requiring extra drilling depth 【 HOLLOW SHAFT FOR WET DRILLING】 Engineered with a hollow center to allow smooth water flow during wet drilling, helping reduce heat, improve cutting efficiency, and extend tool life 【HEAVY-DUTY STEEL FOR MAXIMUM DURABILITY】 Made from high-quality hardened steel for superior strength and long-lasting performance. Built to withstand high-torque professional drilling without bending or breaking 【 PRECISE & STABLE CONNECTION】 Precision-machined threads ensure a tight, secure fit with minimal wobble, providing stable drilling performance and better hole accuracy Product Name:
12 Inch Extension Rod for Core Bits with 1-1/4 Inch UNC Thread

Specification:
Shaft Size 12 Inch, Thread 1-1/4" UNC, 1-1/4"-7 male thread to 1-1/4"-7 female thread Shaft
Size 12 Inch : Total length 350MM, Workable length 300mm

Application:
Work status for connecting with diamond core bits.
Could be used for drill bits with 1-1/4" UNC thread.

Feature：
1. Good quality steel, long life.
2. The shaft is hollow to allow water flow during wet applications.