Starrett's Deep Cut Locksmiths/Doorlock Hole Saw Kit featuring dual pitch hole saws and select accessories. Heat resistant High-Speed Steel teeth welded to a durable alloy backing and cap. The saw is exceptionally strong, safe, and shatter resistant. These tools effectively and economically cut a variety of materials including wood, metal, and steel. Kit includes the following: DCH Series 22mm (7/8''), 25mm (1''), 32mm (1.1/4''), 38mm (1.1/2''), 44mm (1.3/4''), 54mm (2.1/8'') A1E Extended Length Arbor, A10E Extended Length Quick Hitch Arbor, A12 Arbor Adapter