The BLU-MOL Xtreme Bi-Metal Hole Saw features a revolutionary design that increases visibility, accuracy and improves battery and machine life. Diamond-shaped sidewall cutouts increase visibility while large openings on the backing plate allow for quick removal of cut materials. The saw includes fleem ground teeth for longer life. Kit includes (2) mandrels, (1) mandrel adapter, (1) pilot drill, (1) mandrel extension and (1) of the following hole saws: 3/4 in. (19 mm), 7/8 in. (22 mm), 1-1/8 in. (29 mm), 1-3/8 in. (35 mm), 1-1/2 in. (38 mm), 1-3/4 in. (44 mm), 2 in. (51 mm), 2-1/4 in. (57 mm), 2-1/2 in. (64 mm), 3 in. (76 mm), 3-1/4 in. (83 mm), 3-5/8 in. (92 mm), 3-3/4 in. (95 mm), 4-1/8 in. (105 mm) and 4-1/2 in. (114mm).