Hole Saw Set, Arbor Design Built-In Arbor, Tooth Material Bi-Metal, Impact Rated Not Impact Rated, Hole Saw Sizes (Hole Saws) 1 1/8 in, 1 1/4 in, 1 3/8 in, 1 1/2 in, 1 3/4 in, 2 1/4 in, 2 9/16 in, 3 in, 3 5/8 in, 4 in, 4 1/2 in, Thread Size Snap-Lock Plus(TM), Shank Size 3/8 in, Number of Pieces 17