Choosing a high-security lock.
Lock grades, high-security cylinder standards, key control, and why the strike and door matter as much as the lock itself.
By Lock Raven, Maryland Locksmith License #737 · · 5 min read
What do lock grades mean?
| Grade | What it means |
|---|---|
| Grade 1 | Highest strength and cycle rating; commercial and high-security residential |
| Grade 2 | Solid residential and light commercial |
| Grade 3 | Basic residential |
What makes a cylinder high-security?
Extra locking mechanisms beyond a standard pin stack resist picking and bumping, and hardened inserts resist drilling. Cylinders tested to ANSI/BHMA A156.30 or UL 437 have been checked against these attacks. Brands such as Medeco and Mul-T-Lock build to these standards.
What is key control?
With restricted or patented keyways, blanks are not sold to the public, so copies come only from an authorized dealer for the registered owner. That is often the main reason people choose high-security locks.
Why does the door matter?
Most forced entries break the frame, not the lock. A reinforced strike with screws that reach the stud, a solid door, and a full bolt throw make a high-security lock worth having.
Need a hand with this? Talk to a licensed locksmith.
Lock Raven serves Baltimore City and Baltimore, Anne Arundel, Harford, Carroll, and Howard counties. Every job is priced before work starts.