Hole Dozer General Purpose Bi-Metal Hole Saw Set W/Titanium Drill Bit Set (35-Piece)The kit comes with 20 hole saw blades in 13 sizes: 3 4 in., 7 8 in., 1 in., 1 3 8 in., 1 1 2 in., 1 3 4 in., 2 1 8 in., 2 5 8 in., 3 in., 3 5 8 in., 4 in., 4 1 4 in. and 4 1 2 in. and 15 piece SHOCKWAVE Impact Duty Titanium Drill Bit Set with Red Helix are engineered for impacts drivers and drills. For additional durability, this hole saw features RIP GUARD teeth constructed with more steel behind the cutting edge for increased productivity on the job