Milwaukee Concrete Coring Machine. Used to core holes up to 12 inches thick. Machine comes with four Core Bits—Sizes are 2-inch, 3-inch, 4-inch and 6-inch Bits. Also comes with 30 Amp 100 Foot long cord. Retired Plumber is selling this Coring Machine plus other construction tools from his commercial plumbing shop. Coring Machine priced at $700 and we are willing to deliver to you for inspection prior to purchase.