Allegion
Tubular Lock
Schlage LT Series decorative tubular locks were created for use in high-end commercial and multifamily properties. Built from the same foundational technology of the popular Schlage L Series mortise locks, the LT Series tubular locks utilize the same lever designs as the L series and thus provide seamless suiting with both the Schlage mortise lock and most Von Duprin exit devices. Design details combine a feeling of durability with a touch of elegance. The levers of the LT Series tubular locks are manufactured from solid brass and stainless steel to create a firm, heavy feel.
https://us.allegion.com/Products/mechanical_locks/interconnect/ltseries/Pages/defualt.aspx