Perko flush latch with offset cam bar is manufactured from chrome-plated zinc alloy for long-lasting durability. Stainless steel stem. Non-locking latch. T-handle drops down flush in open/closed position (except with the offset cam bar positioned upward). Rubber seal and boot under the T-handle seals the lock cylinder to prevent water intrusion. Easily installs in a 2-1/2" diameter hole of mounting surfaces 1/8" to 3/4" thick. 3/4" - 2-3/8" cam bar adjustment.