15-35mm Adjustable Forstner Bit Hole Hinge Cutter Boring for Wood Drill Bits Set. Type: Forstner Drill Bit. 1pc Forstner Drill Bit. Countersink Drill Bit Set 1PC/5PCS 1/4"(6.35mm) HEX Shank Woodworking Cutter.
eBay