Door lock installation kit bi-metal SM this door lock installation kit features a self-centering jig that will eliminate the fear factor of drilling the holes incorrectly. The self-centering jig provides perfect hole alignment for face and edge holes. Plus it allows for easy enlargement of smaller existing holes. The fold over tabs adjust for 1-3/8 in and 1-3/4 in thick doors. The mounting holes secure the jig and match the latch plate holes. A deep 2-1/8 in bi-metal hole saw bores completely through 1-3/4 in doors. The 1 in bi-metal hole saw cuts a straight; clean hole where the face plate goes.
- Self-centering jig.
- Fold-over tabs for thicker doors.
- Mounting holes secure the jig.