Retractable Door Knob

Date Published: 04/11/2013 6:48 AM

Retractable Door Knob

This concept door knob retracts when it's locked and comes back out when you unlock it. This will help deter theives from breaking in, or help them find houses that are unlocked just by glancing at it, but also confuse you when you come home drunk at 3am.

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