High Security Cylinders and Protected Key Stock

Lock manufacturers are depended upon to control the issuance of key stock.


The original “Peaks Technology” patents focused on a smaller seventh pin located very near the face of the cylinder plug. This “locking” pin is designed to be raised by a detent or “peak” built into each Peak key. When the key is fully inserted, the “locking” pin is raised and if the proper bitting has aligned the rest of the pins to shear line, the plug will rotate.

The functionality of this engagement between the “peak” on the key and “locking” pin is what initially protected the key from being manufactured by others other than KABA.

KABA’s latest innovation is “Peaks Global.” The Peaks Global system incorporates three locking technologies and shear lines: a standard row of pins must be engaged; the seventh locking pin must be engaged by peaks on the top and bottom of the key; and discs must be engaged by “nodes” on each side of the key.

The innovation of discs that are aligned by the side “nodes,” also includes a blocking pins and filler caps in the positions where discs are not being employed.

The positioning and inclusion of discs is used to “personalize” key stock for individual customers.

Of course the innovation facilitates a separate type of patent-protected key stock that KABA can offer to its customers.

For more information, contact your local locksmith distributor or Kaba Ilco, phone 800-334-1381 or web site www.kaba-ilco.com.


The original locking technology employed by Medeco involves pins that must be lift to the proper height while being rotated to proper angles. When this occurs, a sidebar can be recessed into the plug and rotation is facilitated.

As the original patent was expiring, Medeco added the “Biaxial” locking technology. For each designated bottom pin, there were two versions, instead of one. There was a “Fore” bottom pin, or an “Aft” bottom pin. Where the pin would normally seat on the cut of the key was offset to the left or right. This required the key to also be cut either “Fore” or “Aft.”

Medeco now offers a third system based on this original design. It is called “Medeco3.”

Medeco3 keys are milled at the bottom of the right side to engage a “slider” built into the cylinder.

The slider blocks the sidebar. If the slider is not properly positioned, it will keep the sidebar from retracting into the cylinder even when all the pins are lifted and rotated to the proper position.

With the addition of the slider, there are now four different locking technologies in order to make the cylinder operable.

When patented key control is desired and physical pick and drill resistance is not needed, Medeco offers the KeyMark key control product line.

KeyMark’s patented locking technology relies on a multitude of keyways where the bottom portion of the keyway is set off to a prescribed angle. For each keyway there is key stock that matches the angle. One or more dimples in the proper key stock engage locking pins within the cylinder.

KeyMark’s forte is retrofitting with all types of lock cylinders, including small format or figure-eight interchangeable cores while being protected by patents.

For more information, contact your local locksmith distributor or Medeci High Security Locks, phone 800-675-7558 or web site www.medeco.com.


The classic Mul-T-Lock system features telescopic “pin-within-a-pin” tumblers. A standard pin tumbler is one piece. Mul-T-Lock’s telescopic tumblers are composed of four parts: a bottom external pin, bored through in the center, an internal smaller pin that floats inside the external bottom pin; a spring to load the assembly and a driver that sits on top of the spring.

The height of the pin can be independently influenced by either the external or internal pins.

The patent-protected keys are oriented so that they enter the cylinder sideways and engage the pins with drilled dimples. There are two concentric dimples in each area of engagement: one to lift the external pin; the other to lift the internal pin.

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