Reinforcement plate that strengthens door lock areas and helps protect lock hardware Key benefits Increases lock strength by reinforcing vulnerable door spots and supporting lock hardware, reducing stress on the latch and strike area. Durable stainless steel construction resists wear and shape distortion for long term performance. Enhanced finish provides added protection against rust for use in entryway environments. Broad compatibility lets the plate work with a variety of lock types and door materials, making it a practical upgrade for many entry doors. What it does and why you need it Reinforces the area around the bore and latch to reduce loosening, misalignment, and premature wear of deadbolts, knob locks, and keyed latches. Adds backup support for lock hardware so your lock set stays aligned and operates more reliably over time. Suitable for wood or metal doors where the original door material or strike area is worn, weakened, or needs additional reinforcement. Compatibility and dimensions Bore size: 21/8 in Backset: 23/8 in Spacing: 51/2 in Door thickness: fits 13/4 in thick doors Works with deadbolts, knob locks, and keyed latches Check specs prior to installing to confirm fit with your existing hardware Material and performance Constructed from stainless steel for strength and resistance to distortion under repeated use Protective finish reduces risk of rust in typical entryway conditions Engineered to support lock hardware and maintain alignment during normal door operation Practical use scenarios Front entry upgrade: Reinforce the bore and latch area on a wood front door when swapping in a deadbolt to ensure steady performance. Apartment or rental maintenance: Add support to frequently used doors with knob locks to reduce repairs and extend the service life of existing hardware. Metal security door reinforcement: Fit to a metal door with a keyed latch to stabilize the strike area and limit wear from heavy daily use. Installation notes Verify the listed dimensions against your door and lock before installation to ensure a correct fit. Designed to integrate with standard deadbolt and knob lock layouts on 13/4 in doors.