TOLEDO Sliding Door Patio Lock TDP02S Silver Finish - Works With Aluminum, Steel, Wood Or PVC Swinging Or Sliding Doors PATIO DOOR LOCK WILL STOP BURGLARS FROM GETTIN IN : High Grade Quality Sliding Glass Patio Door Lock TOUGH HARDWARE WITH MODERN STYLING : Secure Heavy Duty Spinning Hardened Steel Bolt For High Bolt Cutter And Hacksaw Resistance EASY AND ADAPTABLE INSTALLATION : Tested For Effective Surface Mounted Use On Windows And Interior Or Exterior Sliding Doors Allowing Door To Be Securely Pinned Or Locked In Ventilating Position PROVEN ANTI THEFT DESIGN : Concealed Screws And 1/2" Diameter And 1 3/4" Deep Security Locking Bolt Prevents Lifting Off Rails COMPLIMENTARY LOCKSMITH SERVICE : Conveniently Keyed Alike (When Several Are Purchased In Same Order) Bolt Lock With 2 Key Yale Profile Duplicates With Total Quality Backed Purchase