The FSB latch is a high quality, heavy duty tubular latch manufactured to meet stringent quality standards. This series is designed to work with a vast array of FSB lever handle designs. Built using a heavygauge diecast case, the latch features high strength steel compression springs for long life and durability. The FSB HLL series latches have surpassed over 400,000 operating cycles. Applications include high-end residential, hospitality, retail, and office buildings. The latch is backed by a 3 year limited warranty.