door knobs communicating : ball entry door knob keyed on both sides : double locking cylinders : bump resistant & anti-pick pins : automatic latching : keyed alike toledo <p><b>🔐 knob lock includes free keyed alike service & free theft prevention book - order 1 lock set or 10, we'll custom-key every knob or deadbolt, to work with 1 key unique to your order. retro fits wood or metal door preps (drilling new holes may not be necessary!)</p></b><p><b>🔒 whether you're in or out, you get double the security in one lock!</b></p><p> secure spaces make for joyful people and productive working environments. this stainless steel knob set is perfectly designed to work with keys on both sides. back to back cylindrical deadlatch providing keyed access in both directions for total premise security. the exterior knob will either simultaneously lock or unlock both ends of the lock after a key is used. the spring-loaded latch bolt will not lock automatically when the door is closed unless the key is used again. conveniently reversible for right or left-handed doors. </p><p>made with highly durable steel & brass components. this makes an excellent connection to any standard door prep. architectural design blends in with most door decorative hardware. installation by phillips screwdriver. includes one adjustable ansi grade ii cylindrical 2 3/4" (70mm) and 2 3/8" (60mm) backsets. for door thickness 1 1/4" - 1 13/16". pinned with six chambers, rekeyable cylinder equipped with mushroom pick resistant and anti-bump driver pins. </p><p> well suited for aluminum and wood doors. 100% guaranteed in materials and workmanship. attention: if you are not handy with lock hardware components, please consult with a certified locksmith.</p><p><b>🔑 buy this hard to find knob lock today. don't just lock it...secure it!</p></b>