29 Piece Brite Tungsten High Speed Steel Drill Bit Set includes 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8" 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", and 1/2". No center punch needed: Century 135 degree Quick Cut Points are self-centering and penetrate faster with less pressure. Will not walk or wander at the starting surface. 6 times life rating.