Best Deadbolts (Sep 2026)

Match the case to the slab, not to the shelf label. What matters is slab thickness, edge-bore diameter, the backset from edge to lock body, and how much solid framing sits behind the strike. On exposed coastal entries where driven rain swells the slab, a body that binds in the bore will jam seasonally — so measure after the wet season, not before.

Plan the load path before drilling. A bolt is only as strong as the jamb it lands in, so the strike has to be anchored into framing rather than trim; on hollow steel or thin-clad jambs, spread that load with a reinforcement plate. In high-wind or heavy-snow entries, an unsupported jamb flexes and the bolt walks out of the keep.

Who can duplicate your key, and how easily, matters more day to day than raw torque. A restricted cylinder limits copying but ties you to one source for duplicates; a common profile is easier to service and easier to force. If the entry faces driven rain or salt spray, judge finish by how it survives a wet season, not by showroom shine.

Expect to re-lubricate and re-tension moving parts, and on exterior slabs expect finish work. Graphite is a poor choice in coastal air; a dry-film lubricant sheds grit instead of collecting it. Check the strike screws and the cylinder retaining screw seasonally — frost heave and gate sag move jambs, and a loose keep turns a working bolt into a rattle.

Budget for the whole assembly, not the cylinder alone. Reinforcement plates, a matching handleset, longer anchor screws and a locksmith's rekey after a move all add up; a restricted cylinder can add a per-key charge every time you need a copy. On a salt-exposed door, expect to refinish or replace hardware on a shorter cycle than an inland sheltered entry.

Read what the coverage excludes before buying: most cover mechanical failure, not finish corrosion, scratching or keyway wear, and coastal or unheated installations are often excluded outright. Keep the receipt and model number. For rentals and shared entries, get the owner's approval in writing first — a changed cylinder usually means rekeying everyone else's key too.