STC Core Bit Extension 1-1/4" 7 UNC

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Syntec core bit extension rod, 1-1/4" 7 UNC. Threaded steel extension rods for increasing the drilling depth of core bits. Hex shank for ease of fitment. Suitable for core bits ove r 45 mm in diameter. 1-1/4" 7 UNC thread on each end. Available in 150, 300, and 450 mm extension lengths. Show more