Secret Knock Detecting Lock

Don't you just love the ingenuity?






Build Your Own


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cool lock

Anyone fancy a game of Knock Knock

Only trouble is people across the hall in an Apartment Block could hear your secret secret knock

you would be bolloxed when pist up, i struggle with the keys let alone Knockin.

kinda cool, but too easy for herself to lock you out after an argument, doesn't even have to call a locksmith

Can you not just use the key to open it ??

or knock hard enough and it will just fall off

open sesame sounds better let ali and his 40 thieves in to rob the place what was it called again