4 Flute Annular Cutter 1" Shank Approx 7-3/4" OAL Unmarked Core Drill Bit Pre-owned industrial annular cutter / hollow core cutter. 4 flute cutting design Approx. 1" shank Approx. 7-3/4" overall length Center pilot hole Manufacturer unknown No visible part number or brand Cutting edges appear in good used condition with normal cosmetic wear from storage and use. Please review all photos and measurements before purchasing. You will receive the exact cutter shown.