Lever Lock YC03 Communicating : Commercial Grade II : Double Cylinders Keyed On Both Sides : Anti-Pick Schlage Keyway : Stainless Steel CONVENIENTLY KEYED ON BOTH SIDES FOR COMPLETE SECURITY - Works Like A Double Sided Deadbolt But With Automatic Bolt Latching, Not Self Locking RIGOROUSLY QUALITY TESTED - Verified to withstand at least 225lbs. of force and 400,000 cycles, will Work On Your Aluminum or Wood Door Also Compatible With Electric Lock Systems REPLACES MOST CYLINDRICAL LEVERSET LOCKS - Fits Many Previous Wood or Metal Door Preps (drilling new holes may not be necessary) Consult With a Certified and Licensed Locksmith If You Do Not Have Sufficient Lock Hardware Installation Experience Certified GET PROVEN PROTECTION - Has Pick Resistant 6 Pin Cylinder With Backsets (2 3/8" 60mm 2 3/4" 70mm) Plus 2 keys Included, Certified and Tested Grade 2 UL and ADA Compliant TOTAL 12 MONTH ASSURANCE WARRANTY: You will love the peace of mind your lock brings, thats why it is backed with a 1 year manufacturer hardware assurance and lifetime finish guarantee