![]() It’s a little more tricky to setup but the added security could be worth the effort. It “uses Newton’s 3rd law of physics and applies any force taken and distributes it amongst the lock and door frame”. Portable door lock portable#If you have the money, the “ Travelers Security Lock – Portable Door Lock” is more effective by distributing the force used to push open the door. You can purchase the Calslock direct from Amazon at this link: You can keep one at home and one in your suitcase. It’s not cute and doesn’t have a little chain or a heart-shaped hole, but it works with the locks I see most often. The Calslock is the OVERALL winner for PDLs in terms of size, cost, and ease of use. You can purchase the Addalock direct from Amazon at this link: The more solid Red Handle design, the slightly longer moving metal rod, and the better carrying case give it the edge over the MasterBolt in terms of durability and convenience. In my opinion, the winner for standard tubular doors (particularly internal doors) is the Addalock. The primary differences are the “finger hole” size, the very slight difference in the length of the moving metal rod, and the included carrying case. Metal Plated Body, compared (Left: Addalock, Right: Masterbolt) FYI the deadlatch is the 4th protruding piece of metal from the top or the 2nd piece of metal up from the screw in the following photo: If you’re interested in this at all, check out this thread on Twitter. The “deadlatch” plunger (aka “deadlock plunger”) helps prevent bypass methods like “the credit card trick” we’ve all seen in movies or the much easier Sparrows Hall Pass, which requires a bit of coordination and strength but can open a tubular lock in seconds. ![]() Portable door lock install#This is something that buildings like offices, hotels, apartments like, so they install these There is a special type of door latch called a “scissor latch” that is designed to make doors close more quietly. Only the Calslock works with this type of door The #1 and #2 PDLs DO NOT work with “scissor latch” style door which has a “ deadlatch“. ![]() It would depend how the wall had been drilled out! But as it is just a big cutout hole, The Calslock device could likely be used with this strikeplate. If the strikeplate holes were the same size as the bolts themselves, this device would not work. The Calslock WOULD work with this, because of the strikeplate on the left not conforming to the size of the bolts. It does no damage to the door frame and doesn’t really “grip”, it just “sits” in between the strike and the latch bolt and forms a ring around the strike hole for the Latch Bolt. The door is then closed over the PDL. The PDL mechanism consists of a metal body with “claws” that are inserted into the strike of the door frame. The idea behind a PDL is to prevent the latch bolt from exiting the strike.
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