The set of bi-metal hole saws are suitable for metal and wood doors. The set includes a self-centering jig that can fit door widths commonly found in both interior and exterior doors. The set is adjustable to accommodate backsets of 2-3/8 inch and 2-3/4 inch. The installation process is described as easy and can be completed in three steps. The set also includes a double-sided jig, two bi-metal hole saws, a 3/8" mandrel, a bolt plate template, a custom router bit, and a hinge plate template.
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