Schlage L-Series Extra Heavy Duty Mortise Locks are built to withstand the rigors of daily use without fail. Our L9000 Series locks are ideal for use in schools, hospitals and factories, where the finest hardware must also deliver consistent, dependable operation and stand up to constant use and abuse. We pay attention to these details so you can focus on creating a functional and aesthetically pleasing environment for your clients. In fact, every one of our L-Series locks meets ANSI Grade 1 standards for safety. A multitude of functions, finishes and trim designs are available to meet virtually every security and aesthetic requirement.