Recent Blogs
Mortise Lock Mechanism Explained: How It Works, Parts, Diagram, and Sizing Formula
How a Mortise Lock works — internal lever mechanism, backset and case sizing, BHMA grades, and where commercial doors use it. Engineering breakdown from FIRGELLI.
Lever Tumbler Lock Mechanism Explained: How It Works, Parts, Diagram and Key Differs Formula
Lever Tumbler Lock explained: how the levers, gates and bolt stump interact, real applications in safes and mortice locks, plus sizing maths and FAQs.