Easily Drills High-Quality Flat-Bottomed And Pocket HolesFeatures Optimized Ultra-Sharp Cutting Teeth Specifically Engineered To Cut Through Hard And Soft Woods Smoothly And EfficientlySignificantly Reduces Cutting Time Compared With Traditional Forstner BitsReduced Shank Fits 3/8" And Larger Drills And Drill Presses, 1-1/2" (38.1Mm), 1-5/8" (41.2Mm), 2" (50.8Mm) Forstner Bits