• Best For: Wet coring 1-3/8-inch holes in applications with moderate to high steel reinforcement, where fast, aggressive drilling matters.
• Highlight: MK Black supreme grade engineered for exceptional footage and fast, aggressive drilling, here in the 1-3/8-inch diameter.
• Expert Note: Choose by finished hole diameter: this 1-3/8-inch bit is part 156378; in the same MK Black Supreme wet core bit line the 1-1/8-inch is 156377 and the 1-5/8-inch is 156379.
