• Best For: Concrete drillers who need a 4-inch (102mm) core and expect heavy steel reinforcement in the cut.
• Highlight: High diamond concentration and a turbo segment design channel slurry better and reduce vibration at 4-inch; in the MK-Blue Turbo line this size sits between the 3-1/2-inch and 4-1/2-inch bits.
• Expert Note: Drilling depth is 14 inches on the 1-1/4-7 nut; longer reach needs an MK core bit extension ordered together with the bit, and the 4-inch (102mm) size is part number 156574.