To help identify the quality and durability of locksets and deadbolts, the American National Standards Institute (ANSI) — has established three grades or standards for door locks. Each product must pass a series of operational and security tests.

Grade 1
Meets commercial building requirements
Provides the best residential security available

Knobs

• 800,000 cycles
• 6 door strikes
• 360 pound weight test

Deadbolts

• 250,000 cycles
• 10 door strikes (hammer test)

Grade 2
Meets light commercial and exceeds residential building requirements
Exceeds standard residential security requirements

Knobs

• 400,000 cycles
• 4 door strikes
• 250 pound weight test

Deadbolts

• 150,000 cycles
• 5 door strikes (hammer test)

Grade 3
Meets residential building requirements only
Provides minimal residential security

Knobs

• 200,000 cycles
• 2 door strikes
• 150 pound weight test

Deadbolts

• 100,000 cycles
• 2 door strikes (hammer test)

Every Schlage lock and deadbolt undergoes the following tests to determine their grade level:

• Cycle tests
• Door impact tests
• Bolt strength tests
• Resistance tests
• Warped door tests

Only Schlage offers Grade 2 Maximum Security locks that provide the Grade 1 security features usually reserved for commercial buildings.

Grade 1 Security Features of Schlage Maximum Security Locks

3" screws with steel door frame reinforcer protect against violent forced entry attacks.

1" deadbolt with steel inner core provides Grade 1 security against kick-in and saw attacks.
Solid, one piece design provides Grade 1 security against hammer and crow bar prying attacks.

The brass key cylinder provides Grade 1 Security to prevent key cylinder from being knocked out.

Schlage also offers Maximum Security Combo Packs combining the best deadbolt security with the attractive styling of Schlage handlesets, levers and knobs.

Maximum Security Handleset Lever / Maximum Security Knob