B4 ¾” – Fits 4 ¾ Inch Core Bit – Standard Block (Imperial) Style:With Bolt The B8 ½” Block is

The B8 ½” Block is built to help you hit the mark every time – no expensive rigs

The B216 Block is built to help you hit the mark every time – no expensive rigs

Core Bit Fit: Designed for 9 ½ Inch Core Drill Bits

the B68 delivers bulls-eye accuracy

Core Bit Fit: Designed for 6 Inch Core Drill Bits

B4 ¾” – Fits 4 ¾ Inch Core Bit – Standard Block (Imperial) Style:With Bolt The B8 ½” Block isDesigned for precision, safety, and speed when core drilling by hand. The B4 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 B4 delivers bulls eye accuracy, faster setup, and safer operation on concrete walls, floors, manholes, pipes and more. Key Features: Core Bit Fit: Designed for 4