Door Dead Bolts : Single Cylinder Keyed - Commercial Grade 2 : Restricted High Security Key Lock : Keyed Alike When Several Purchased Per Order : By TOLEDO GET TOTAL CONTROL OF WHO HAS ACCESS TO YOUR KEYS - Exclusive MX4 Restricted High Security Lock & Keys REST ASSURED WITH REAL PEACE OF MIND - Keyed Entry With Thick Protective Metal Cladding Virtually Bump Proof Anti-Pick Pins PROVEN TO BE TOUGH COMMERCIAL GRADE - Fits Existing Pre-drilled Holes With Strong Cylindrical Lock Set Housing with Heavy Duty Anti-pry Sleeve TRUSTED ANSI CERTIFIED AND TESTED - Fire Rated For 3 Hrs., Grade 2 UL Though-bolt ADA Compliant X2 Do Not Duplicate Stamped Keys For Key Control COMPLEMENTARY EXPERT LOCKSMITH SERVICE - Uniquely Keyed Alike When Several Purchased Per Order. Immediately after purchase, customer must provide Amazon order# associated with key duplicate purchase. Please note that custom cut keys cannot be refunded, returned, cancelled or credited.