Medeco KeyMark

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Medeco KeyMark

Medeco KeyMark
Medeco Keymark KIK cylinder.jpg
Name Medeco KeyMark
Manufacturer Medeco
Lock Type Cylinder
Lock Design Pin-tumbler
Year(s) Produced 1995-present
Patent US #RE35518

The KeyMark is a pin-tumbler lock made by Medeco. The KeyMark is designed for installations where key control is more imporant than resistance to physical attacks, but it does offer basic defenses against picking and destructive entry.[1] KeyMark is best known for its restrictive keyway, marketed as the "Security Leg"™.

Principles of operation

See also: Pin tumbler (Principles of Operation)

The KeyMark is a standard pin-tumbler lock that uses six pin stacks. The key raises all pin pairs to the correct height and the plug can be rotated. KeyMark models that use interchangeable cores have a dual shear line mechanism similar to those found in BEST locks. No security pins are used in the Keymark.

Disassembly instructions

The KeyMark is disassembled following traditional pin-tumbler disassembly steps:

  1. Remove the cam or C-clip.
  2. Insert the key and turn the plug 45-90 degrees.
  3. Withdraw the plug from the cylinder. (A plug follower is recommended)


  1. Remove the chamber casings and take out each pin-stack individually
  2. Remove the cam or C-clip.
  3. Withdraw the plug from the cylinder.


The KeyMark may be vulnerable to one or more of the following:



See also