Forstner Bit Set, High-Speed Steel, 4-Pc.4 piece, forstner, high speed steel bit set, sharp center spur accurately locates the center of your hole, use for drilling flat bottom holes, pocket holes or overlapping holes, set includes 1 each: 1" (cut diameter: 1", overall length: 3 1 2", shank diameter: 3 8"), 3 4" (cut diameter: 3 4", overall length: 3 1 2", shank diameter: 3 8", 1 2" cut diameter: 1 2", overall length: 3 1 2", shank diameter: 5 16" & 1 4" cut diameter: 1 4", overall length: 3