Sheet Metal Cutter Set HSS Metal Number of Pieces 9Use Arbor Mfr No 0018255 and 0018245 Sheet Metal Hole Cutting Includes (6) Sheet Metal Cutters (7/8 In. 1-1/8 In. 1-3/8 in 1-3/4 in 2 in and 2-1/2 In.) (1) 3/8 in and (1) 1/2 in Arbor Assembly Pilot Pin and Carrying Case