Tumbler locks, otherwise called chamber secures a few cases have a solitary, key worked barrel in light of one side of an entryway which permits no need for a key to be utilized to enact it from the other side. The twofold barrel key worked locks do, then again, need a key on both sides with the end goal it should work.
In their most fundamental frame the chamber lock depends on configuration from old Egypt, made of a wooden post joined to an entryway and a parallel jolt that would slide into spot in the post. This jolt, which had an upright opening with an arrangement of pins, had the capacity be lifted to the fundamental stature and opened by utilization of a key to move the jolt.
The fitting of a tumbler lock has a straight shaped opening for a key way which lets the key enter the attachment. The key way of a tumbler lock has projecting edges which help in keeping the pins from falling into the fitting hence making it a lot more impervious to bolt picking.
Make certain to cross-check with all proper fire and construction laws before introducing twofold barrel locks as they are limited when blocking access to the outside if there should arise an occurrence of crises where a speedy way out is required, and don't overlook, counsel a star before doing anything independent from anyone else.