
Grade 3 Locks
Grade 3 locks are the lowest strength locks allowed to be sold as door locks in the United States. The durability of Grade 3 locks is measured by the number of cycles and the amount of force grade 3 locks are built to withstand. Grade 3 locks can operate for at least 200,000 cycles and should withstand 120/225 lbs. of force per inch for knobs/levers. These locks should not be used for exterior doors–they’re better suited for interior doors like storage spaces.
Grade 2 Locks
With a Grade 2 lock, you’ll have significantly more strength than Grade 3 locks. Grade 2 locks can be used in your business and are the perfect lock for securing your home. Tested to withstand twice as much use as Grade 3 locks, Grade 2 locks are capable of operating through 400,000 cycles and withstanding 150 lbs. of force per inch for knobs and 450 lbs. per square inch for levers. Because they are required to meet certain requirements in order to qualify as Grade 2 locks, Grade 2 locks are harder to pick, break, or pry open. We recommend Grade 2 locks to secure your home or business!
Grade 1 Locks
When you need maximum security, choose a Grade 1 lock is the best choice. Grade 1 locks must perform without fail for 800,000 cycles. They must also withstand 300 lbs. of force per inch for knobs and 700 lbs. of force per inch for levels. Since they can endure frequent use and they remain dependable against prying, Grade 1 locks are perfect for doors used frequently or exposed to potential thieves. You can deter break-ins and gain confidence when you choose Grade 1 locks for your business or home. Advanced Lock and Security can install the industry approved locks your doors need.
Whether you’re replacing old locks or installing locks on new doors in your home or office, paying close attention to the grade of your locks can make all the difference. Locks are tested and graded in order to ensure uniform quality and dependability across the board. We recommend the higher resistance Grade 2 and Grade 1 locks for your frequently used doors. Take advantage of Advanced Lock and Security service so that all your locks can make the grade!