Locks safeguard doors, gates, cabinets, and equipment by delivering reliable security, privacy, and access control for homes, rentals, offices, and job sites. From rugged deadbolts to smart locks with keyless entry, the right choice balances strength, convenience, and environment. Popular types include deadbolts (single or double cylinder), mortise and cylindrical lever sets, padlocks (keyed or combination, weatherproof, shrouded shackle), smart locks (keypad, fingerprint, Bluetooth, Wi‑Fi, Z‑Wave), and specialty options like cam and cabinet locks. Look for features such as hardened steel components, anti-drill plates, anti-bump pins, pick resistance, and shrouded shackles for improved protection.

Security ratings help you compare performance. ANSI/BHMA Grade 1 offers the highest durability and resistance, followed by Grades 2 and 3. For coastal or outdoor use, choose stainless or weather-resistant finishes to combat corrosion. Rekeyable cylinders (common keyways like SC1 or KW1) support easy key management and master key systems, reducing downtime and replacement costs. Smart door locks add remote control, schedules, temporary codes for guests, and audit trails, integrating with home automation and commercial access control platforms.

Fit and installation matter. Measure door thickness, borehole (typically 2-1/8 inch), cross-bore (1 inch), and backset (2-3/8 or 2-3/4 inch). Upgrade strike plates and use 3-inch screws in the door jamb for stronger kick-in resistance. For gates and sheds, pair hardened padlocks with solid hasps and security chains.

Quick buying tips:
- Match the lock to the risk level and traffic (residential vs. commercial).
- Check ANSI/BHMA grade and material quality.
- Decide on keyed vs. keyless entry and integration needs.
- Plan for rekeying, key control, and spare keys.
- Confirm weather resistance for outdoor applications.
- Maintain with graphite or PTFE lubricant and replace smart lock batteries on schedule.

Whether you need a high-security deadbolt, a durable padlock, or a feature-rich smart lock, choosing the right hardware improves safety, convenience, and long-term value.