Budget hollow brass plug follower set. Used to keep top pins and springs from falling out of the lock when removing the plug for re-keying. Approximately 75mm length and 0.3mm wall thickness

Set of three sizes 10mm (.395″), 12mm(0.470″) and 12.6mm(0.495″)

Use our 12.75mm aluminum tube if you are in need of .500″ here – aluminium-tube-12-75mm-x-100mm-length

*** We strongly recommend and advise to always use a shim when removing/inserting a core ***