Reddit reviews Knob Lock CB03 Communicating : Keyed Alike Cylinders On Both Sides : Bump-Pick Resistant : Cylindrical Grade 3 : Double Keyed Alike Cylinders : Yale Lock Keyway

LOCKING DOOR KNOB KEYED ON BOTH SIDES FOR 200% IMPROVED SECURITY!- Use These Schlage Lock Keyway Twin Door Knobs With Lock And Key Like A Double Sided Door Lock Deadbolt But With Automatic Bolt Latching - Not Self LockingREPLACES MOST CYLINDRICAL BALL ENTRY KNOB LOCK HARDWARE - Fits Many Previous Wood or Metal Door Preps (drilling new holes may not be necessary!) Consult With a Certified & Licensed Locksmith If You Do Not Have Sufficient Lock Hardware Installation ExperienceINDUSTRY PROVEN PROTECTION WITH BUMP BLOCKER & MUSHROOM PICK RESISTANCE - Anti-Bump & Pick Resistant, ANSI Certified Commercial Grade 2 Secure Backsets (2 3/8" 60mm and 2 3/4" 70mm) For Sure Fitting For door thickness 1 1/4" - 1 13/16". A simple turn is all it takes to operate. Includes 2 KeysTOTAL QUALITY ASSURANCE TESTED DOUBLE SIDED LOCK DOOR KNOB - Verified to withstand at least 120lbs. of force & 200,000 cycles, will Work On Your Aluminum or Wood Doors With Standard Preps Also Compatible With Electric Lock SystemsDOUBLE KEYED ENTRY DOOR KNOB 25-YEAR WARRANTY - We know you’ll love the peace of mind your lock brings, that’s why it’s backed with a 25-year manufacturer hardware warranty and 5-year silver door knobs finish guarantee