Commercial Rekeying in Havelock-Belmont-Methuen

Not reliably. The stamp is a request, and any key on a standard blank can be copied by anyone with the blank and a machine. What does work is controlling the blank itself through a restricted keyway, or controlling access to the lock through interchangeable cores and a tight register. Stamping still has a place: a serial code on each key, instead of the business name, lets you track it without telling a finder where it fits.

It needs a plug that rotates without catching, pins that return under their springs, and a face free of heavy corrosion or cracks. Most commercial cylinders in daily use pass easily. Ones that are stiff, gritty or green with salt bloom can sometimes be cleaned and repinned, and the locksmith will say when a replacement for that door is the better value; the rest of the doors are rekeyed regardless.

In a master key system each lock accepts its own change key and also a master key above it, so a manager carries one key while staff carry keys that open only their own doors. Small businesses with three or four doors often manage without one. A master earns its place once there are several rooms with different people in them, or several locations, and the owner would otherwise carry a ring of keys.