Bump-Resistant Cylinders

Protect your building from unwanted entry. Tested and verified by an independent testing lab, the bump-resistant cylinder is an option available with Corbin Russwin conventional and Pyramid patented security and high-security cylinders on our mortise, cylindrical and exit device hardware and more.


Bump-resistant cylinders are designed for use with all Corbin Russwin locking hardware:

  • Cylindrical locks
  • Mortise locks
  • Exit devices
  • Access control locks
  • Unit locks
  • Auxiliary locks

Note: Bumping is when a “bump key” is inserted into the cylinder and struck using a mallet or hammer type object. The bump key is specifically designed to transfer the energy from the force of the blow to create a separation in the cylinder’s pins which compromises the lock allowing it to open.