Marks USA's durable Survivor series of cylindrical lever locksets is offered in four lever styles, conventional cylinder, or IC core for "Best" size cores, Schlage® as well as others. Marks locksets feature a lifetime mechanical warranty. All functions are available in seven standard finishes, are UL Listed for 3-hour fire rating, and satisfy the requirements.
The HI-SECURITY™ Cylinders locking principle includes the combination of standard pin tumbler cylinder with a sidebar locking mechanism which corresponds to a "security wave" designated by unique shaped side pins which correspond to a factory milled groove on the key. Information: (631) 225-5400.