The dangers of door lock bumping and the way it works

Description: Door lock bumping is a phenomenon that has been getting a lot of attention in recent years. Almost all homes still use cylinder locks as a main source of security. However, these locks are easily compromised with a little know-how and a few basic tools.

Overall about door lock bumping in home security

To bump a door lock, a burglar inserts a specially cut key into the lock, and then gently “bumps” it with a mallet or a screwdriver. This forces the pins in handle lock to the shear line as the key turns and the door opens.

  • The “bump key” required to accomplish this is very simple to acquire. You can also easily order it online.

  • The technique requires no special skill and it's effective most of the time. That means it allows thieves to enter your home without any sign of forced entry.

Picture 1: Door lock bumping is becoming more and more popular in home security

Therefore, it’s a realistic threat that you should take seriously when evaluating home security. People first classified door lock bumping as a security concern around 2002.

History of lock bumping

Lock bumping is a technique that had locksmiths long used for half a century. This is best way when they needed to access a lock with no key readily available. However, it was not a well-known criminal technique.

Lockpicking was still the most well-known way around door lock. Indeed, it takes time and requires specialized tools and training. The brute force to get around a handle lock makes noise and leaves behind signs of a break-in. On the other hand, lock bumping, is quick and relatively quiet.

The Bump key - the most important part makes your door lock danger

A bump key is necessary for lock bumping to be effective. The key must be the appropriate size for the handle door lock. However, the only other requirement is that each ridge in the key is cut to maximum depth.

People often refer to bump keys as “999 keys” because each ridge has a depth of nine in a key-making machine. These keys are therefore easy to produce and acquire. Moreover, they take less than five minutes to make.


Picture 2: You can easily order bump key for door lock on amazon and other buying website

Older and cheaper door lock items are actually more resistant to bumping. The reason?! Very easy, they can not cut as precisely. You must know that they're clunkier and the internal pins don’t move as smoothly as higher-end locks.

Door lock bumping common statistics

It is difficult to know how prevalent door lock bumping currently is in home break-ins. Thus it leaves no sign of forced entry and the lock continues to work normally afterward. As a result, a burglar needs to be captured with lock bumping tools in his possession. They caught in the act to verify that lock bumping was available in a crime.

As usual, almost two-thirds of all break-ins do not show signs of forced entry. Many of break-ins likely happen when criminals gain entry through an unlocked door or window. It can also obtain a duplicate key through dubious means. Door lock bumping should not discounted as a serious threat even though it's difficult to quantify.

Prevention door lock bumping, how can we do from now?

The Internet is full of videos, articles, and instructionals on how to bump a lock and methods to acquire the key needed to accomplish the task. So that, you'll need stronger locks or additional security features to minimize risk:

Add chain latches to your exterior doors

Do it if you don’t have them already. This doesn’t affect your door lock susceptibility to bumping. However, it provides an additional barrier for a thief to bypass in order to gain entry.

Picture 3: You can reduce door lock bumping by installing chain latches

Having a locksmith modify your existing locks and deadbolts by adding additional pins to them. It doesn’t make your locks immune to lock bumping. On the other side, it can make the process more difficult. This is usually more cost-effective than lock replacement.

Replace your existing locks with bump-resistant locks

Of course, you should only do it if you can afford it. The exterior locks are typically much more expensive, and door lock bumping won’t work on them. You can usually install these locks yourself if you want to save on installation fees.

Install a home security system

This is the best way you can do. A security system detects when a door opens, regardless of how it happens. The system then sets off an alarm or alerts authorities once the lock has been compromised and a burglar tries to enter the house.

While door lock bumping is a genuine concern, your priority should ensure that you locked all your doors at night. Especially when you’re not home, as those points of entry still pose the larger security risk. Once you know your house is secure enough, examine how to make those exterior defenses stronger. Talk to a locksmith about improving or replacing your existing cylinder locks to find out what potential solutions fall within your budget.

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