Forstner Drill Bit, 1/2" Dia, 3-1/2" OAL, 1-Flute, 3/8" Dia Shank, Reduced Shank, IRWIN 1966896/42908
Starts the bit cleanly on uneven surfaces and bores smooth, flat bottomed holes. Fits 3/8 in and larger drills and drill presses.