The Beginner Bump Key Set for the 5 Most Common locks in North America
This set covers the 5 most common locks that you will encounter on a daily basis. This beginner bump key set comes with the most common padlock key (Masterlock M1), and the 4 most common door knob keys (KW1, KW10, SC1, SC4).
The next time a neighbor, friend, or family member locks themselves out, you will be the hero with this bump key set. One visit from a locksmith will cost you a lot more than this set. This beginner set is for the individual who’s looking for their first bump key set. When you need access to a lock in the United States you are going to want to start with this set. The great thing about this set is that it has good coverage of a popular padlock keyway (M1) and includes the most popular residential key ways (Schlage 5 & 6 pin, Kwikset 5 & 6 pin). This set should be a bare minimum addition for any locksmith and a must have addition to any tool drawer.
We have precision milled these bump keys specifically for lock bumping. Made from quality key blanks they are durable and long lasting. They will not inflict any wear or damage on the target lock sets.
- Kwikset KW1 House – 5 Pin
- Master M1 Padlock – 4 Pin
- Schlage SC1 – 5 Pin
- Schlage SC4 – 6 Pin
- Kwikset Titan KW10 – 6 Pin
- Set of 5 Speed Bump Rings
- Bump School Keychain
- Free E-Book
Visit the Bump School 101 Blog for additional information about lock bumping.
We also offer many other bump key sets and tools here at our SHOP, including these popular sets!
Lock bumping is a lock picking technique for opening a pin tumbler lock using a specially crafted bump key,rapping key or a 999 key. A bump key must correspond to the target lock in order to function correctly.
A pin tumbler lock is composed of a series of spring-loaded stacks called pin stacks. Each pin stack is composed of two pins that are stacked on top of each other: the key pin, which touches the key when it is inserted, and the driver pin, which is spring driven. When the different length key pins are aligned at their tops by the insertion of the correspondingly cut key at their bases, the tops of the key pins and, consequently, the bases of the driver pins, form a shear line, so that the cylinder can be turned, rotating the key pins away from the driver pins. When no key or the wrong key is in the lock, pin misalignment prevents the cylinder from turning.
When bumping a lock, the key is initially inserted into the key way one notch (pin) short of full insertion. Bumping the key inward forces it deeper into the key way. The specially designed teeth of the bump key transmit a slight impact force to all of the bottom pins in the lock. The key pins transmit this force to the driver pins; the key pins stay in place. This physics action can be visualized by observing the same effect on the desktop toy: Newton’s cradle. Because the pin movements are highly elastic, the driver pins “jump” from the key pins for a fraction of a second, moving higher than the cylinder (shear line of the tumbler), then are pushed normally back by the spring to sit against the key pins once again. Even though this separation only lasts a split second, if a light rotational force is continuously applied to the key during the slight impact, the cylinder will turn during the short separation time of the key and driver pins, and the lock can be opened while the driver pins are elevated above the key way.
Lock bumping takes only an instant to open the lock. The lock is not visibly damaged, although the force of the bump can leave an indentation on the front of the cylinder. Certain clicking and vibrating tools designed for bumping can also be used. These allow for rapid repetition of bumping against locks that have advertised “bump proof” features. Only a rare few key-pin locks cannot be bumped.