"...increase the resistance to pulling the core compared to normal cylinders."
"Patented laminated steel core that provides snap resistance to both flexural and pulling test."
www.security.ingersollrand.com/bumpandsnap/documents/cisacy...
You can install a double core dead bolt lock by first removing the old cylinders from the door. ... Pull the cylinder out of both sides of the door.
www.ehow.com › Home Maintenance & Repair
"... the removabable core enables the lock to be rekeyed without removing the lock from the door or having to replace ..."
www.wadsworthsecurity.com/thebestmasterkeysystem.htm
The K-tool can be used to pull the core from the lock without damaging the door itself. ...
en.wikipedia.org/wiki/K-tool