M³ Key in Lever/Knob

Medeco³ Key-in-Knob cylinders are designed to retrofit knob type cylindrical locksets, lever type cylindrical locksets, padlocks and bored type auxiliary deadlatches and deadlocks. 20 series, Key-in-Knob cylinders are UL437 listed for drill and pick resistance, and the those that incorporate the Medeco³ design, offer utility patented key control.

Medeco³ Key-in-Knob cylinders can be ordered with a variety of different cylinder technologies, including the features below for Medeco³.

Patented Key Control - Protects against unauthorized duplication of your keys.
  Uses Existing Hardware - Can be masterkeyed into a system containing Medeco BiLevel, Medeco³ Mechanical; as well as Medeco³ CLIQ Intelligent Key Systems. Medeco³ cylinders are available in a wide variety of formats, retrofitting most hardware on the market today.
  Can Be Masterkeyed - Can be masterkeyed into a system containing Medeco BiLevel and Medeco³ Mechanical as well as Medeco³ CLIQ Intelligent Key Systems.
  Protection From Physical Attack - Medeco³ cylinders are UL 437 listed and stand up to drilling, picking and other forms of physical attack.
  Special Angle Cut Keys - Requires a special key cutting machine and access to Medeco specific blanks, available in a variety of restrictions to support every need.
  Picking & Bump Protection - Medeco³ cylinders use a sidebar that prevents the key from rotating until it is elevated, rotated and aligned in the correct position.  This feature offers protection against bumping and picking attacks.

To compare the mechanical features, see the below chart.

Mechanical Cylinder Features




UL listed x
Grade 1 Certification x    
BHMA A156.30 Level A Certification the cylinder x    
Can be incorporated into a new master key system x x x
Protect against drill, wrenching, bumping and prying attacks x
Solid Brass Construction x x x
Key may be ordered with a prox head x x x
Patent Protected Keys x x x

For loss and liability control, Medeco³ Key-in-Knob cylinders are available in the following eCylinder options:

Electronic Cylinder Features

Medeco XT

Classic CLIQ


Audit of the cylinder x x x
Audit of the key x x x
Can be incorporated into Medeco® Mechanical system     x
Provides Scheduling x x x
No wiring involved x x x
Multiple user access groups x x x


  • Hardened Steel inserts positioned in critical areas of the cylinder, providing a high degree of drill resistance
  • UL437 listing provides assurance that cylinders meet universal standards for drill and pick resistance and stand up to other types of forced attack
  • The package contains one cylinder and a variety of different tailpieces, providing a greater retrofit cabability, while at the same time reducing the amount on inventory required
  • Unique elevating and rotating tumbler pin system is virtually pick proof
  • All Medeco cylinders are constructed of durable machined brass components, designed to last the life of your equipment
  • Patented Medeco³ Key-in-Knob cylinders  keys may only be duplicated by Medeco® or an authorized Medeco® service outlet, and only at your request
  • Locks can be keyed alike, keyed different, or master keyed depending on your specific needs


  • Over 100 different cylinder designs and tailpiece configurations enable Medeco® to offer the largest retrofit capability in the industry. More retrofit cylinders means fewer replacements of the complete lockset


  • Warranted for two (2) years against manufacturer's defects. See the Medeco® limited warranty for full details


  • 05 - Bright Brass 
  • 06 - Satin Brass 
  • 09 - Antique Brass
  • 10 - Satin Brass Blackened 
  • 11 - Bright Bronze
  • 12 - Satin Bronze
  • 13 - Oil Rubbed Bronze 
  • 18 - Bright Nickel 
  • 19 - Satin Nickel
  • 20 - Antique Nickel
  • 22 - Black 
  • 24 - Dark Bronze 
  • 25 - Bright Chrome 
  • 26 - Satin Chrome


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