PDQ offers high-security cylinders and proprietary keyways to prevent random duplication of keys. The PDQ proprietary keyway (only available from PDQ) is shipped directly to the authorized end user. Each key is registered, and no blank keys are sold.
 
High-Security cylinders are available in a number of formats, including standard, Key-In-Knob, or Lever cylinder as well as a unique Mortise/ Rim Cylinder that can be used in either configuration. All PDQ High-Security Cylinders feature 2 hardened anti-drill pins as well as our proprietary PDQ keyway with its unique floating sidebar.
 
UL437 cylinders are also available. These optional cylinders feature a minimum of 11 anti-drill pins, stainless steel pins, and UL437 certification. UL 437 cylinders are available in Key in Knob/Lever, Mortise, and Rim.