B172 – Fits 172mm Core Bit – Standard Block (Metric) Accessories The AB5 ¾” Block makes

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B172 – Fits 172mm Core Bit – Standard Block (Metric) Accessories The AB5 ¾” Block makesDesigned for precision, safety, and speed when core drilling by hand. The B172 Block is built to help you hit the mark every time no expensive rigs, no risky setups. Just accurate, safe, and efficient drilling. Trusted by core drillers, plumbers, sparkies, drain layers, and even DIYers, the B172 delivers bulls eye accuracy, faster setup, and safer operation on concrete walls, floors, manholes, pipes and more. Key Features: Core Bit Fit: Designed for