Invest in these Irwin door lock installation kits to upgrade your entrance closing system. This adjustable wood door lock installation kit allows for both 2 3/8 in and 2 3/4 in backsets and is self-centring, allowing it to fit interior and exterior doors. Each pack contains 6 pieces.

– Carbon hole saws quickly create handle and lock openings for interior and exterior doors
– Self-centering jig fits all common door widths