ASSA ABLOY is the global leader in door opening solutions.

ASSA Lock® is a leading edge company that continuously monitors and drives the development of lock and security issues further. With our comprehensive range of products and services, ASSA Lock can set up security systems with appealing design that suit your specific needs.

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Key-in-Knob/Lever Cylinders

ASSA Key in Knob/Key in Lever cylinders provide the ultimate in high security retrofit for a variety of leading cylindrical lockset manufacturers including Sargent, Arrow, Corbin-Russwin, Yale, Falcon, Schlage, and Weiser. All ASSA Maximum+ and Twin Series Key in Knob/Key in Lever cylinders are listed under U.L. 437 and are available in BHMA hardware finishes 626 and 606.


  • Designed to exact manufacturers’ specifications
  • Two independent locking mechanisms to ensure security and optimum pick resistance
  • Inactive “false” grooves on side pins designed to catch picking tools
  • Extremely close tolerances
  • Can be easily rekeyed in the field
  • Patented key control


  • Please see current price list for warranty policy


  • All ASSA Maximum+ and Twin Series Key-in-Knob/Lever cylinders are U.L. 437 listed

Technical Information:

  • Available in 16 different retrofit assemblies
  • Cylinder shell and plug made of high quality brass
  • Stainless steel top pins
  • Bottom pins and master pins are nickel silver


BHMA Symbol US Symbol Euro Finishes Description
626 US 26D 13 Satin Chrome
606 US 4 23 Satin Brass


Key in Knob/Lever Catalog

Key in Knob/Lever Catalog (.pdf, 370 kB)