Sliding Patio Door Lock : Security Hardened Keyed Bolt : Uses Yale Lock Keyway : White : By TOLEDO BURGLARS WILL HAVE A TOUGH TIME GETTING THROUGH THIS - Top Grade Quality Sliding Glass Patio Door Lock TRUSTED HARDWARE WITH MODERN STYLING - Secure Heavy Duty Spinning Hardened Steel Bolt Pin For High Bolt Cutter and Hacksaw Resistance EASY & ADAPTABLE INSTALLATION - Allows Air Circulation Without Compromising Security.Tested For Effective Surface Mounted Use On Windows and Interior Or Exterior Sliding Doors PROVEN ANTI-THEFT DESIGN - Hidden Steel Mounting Screws and 1/2" Diameter - 1 3/4" Deep Security Rotating Locking Steel Bolt COMPLEMENTARY LOCKSMITH KEYED ALIKE SERVICE - Conveniently Keyed Alike (When Several Are Purchased In Same Order) Bolt Lock With 2 Key Yale Profile Duplicates - Complete Quality Backed Purchase