What is a deadbolt lock?
A deadbolt is a lock with a bolt that isn't spring-loaded. Once thrown, it can't be pushed back by sliding a card or prying the latch. It usually sits above the doorknob and extends about an inch into the door frame.
Single vs. double cylinder
- Single cylinder: key outside, thumb turn inside. The most common choice for homes.
- Double cylinder: key on both sides. Useful next to glass, but check local fire codes, since you need a key to get out.
- Keypad deadbolts: a code instead of a key, often with a key backup.
Understanding ANSI grades
ANSI grades locks from 1 to 3. Grade 1 has passed the toughest strength and durability tests and suits exterior doors. Grade 2 is common for residential entries. Grade 3 is basic.
Installation details that matter
A deadbolt is only as strong as the frame it locks into. Long screws in the strike plate that reach the wall stud make a big difference against kicks. A locksmith can install the lock and reinforce the strike in one visit.
Next steps
See our residential locksmith services or check the new customer coupon on purchased deadbolts.
Need help now? Call 650-425-6062 or see our emergency locksmith service.
