B138 – Fits 138mm Core Bit – Standard Block (Metric) Style:With Bolt The B242 Block is built

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B138 – Fits 138mm Core Bit – Standard Block (Metric) Style:With Bolt The B242 Block is builtDesigned for precision, safety, and speed when core drilling by hand. The B138 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 B138 delivers bulls eye accuracy, faster setup, and safer operation on concrete walls, floors, manholes, pipes and more. Key Features: Core Bit Fit: Designed for