Irwin (928) 3111001 IRWIN Wooden Door Lock Installation Kit, 3111001.

The IRWIN Wooden Door Lock Installation Kit uses durable carbon hole saws to cut openings in interior and exterior wooden doors for installing lock and handle sets in four easy steps. With a self-centering jig adjustable for 2-3/4" and 2-3/8" backsets that fits all common door widths, it makes precisely installing a door handles and locksets in any blank door fast and simple. Includes 2 carbon hole saws, 3/8" mandrel, custom router bit, bolt plate template, and hinge plate template.