• Best For: Crews that need a 6-1/4 inch core hole through material with moderate to high steel reinforcement and want the MK Diamond 156393 size rather than another diameter in the MK Black Supreme line.
• Highlight: MK Black is a supreme grade MK Diamond core bit engineered for exceptional footage and fast, aggressive drilling, and part 156393 delivers that in a 6-1/4 inch diameter.
• Expert Note: This MK Diamond bit is a wet core bit, and its 6-1/4 inch diameter sets the finished hole size, so confirm that diameter before ordering because 156393 is sold separately from the other MK Black Supreme sizes.
