Easily drills high-quality flat-bottomed and pocket holes. Features optimized ultra-sharp cutting teeth specifically engineered to cut through hard and soft woods smoothly and efficiently. Significantly reduces cutting time compared with traditional forstner bits. Reduced shank fits 3/8' and larger drills and drill presses. Set includes 1/4' (6.3mm), 3/8' (9.5mm), 1/2' (12.7mm), 5/8' (15.8mm), 3/4' (19.0mm), 7/8' (22.2mm), 1' (25.4mm), 1-3/8' (34.9mm) forstner bits.