45 degree latch retraction Heavy duty spring loaded reversible latch Push button auto release with privacy function Concealed screw mounting All metal construction Fits all standard 2 1/8" hole prepped doors Premium quality finishing Available in 2 3/8" and 2 3/4" backset 20 minute fire rating available Can be used with 1 3/8" and 1 3/4" thick doors Lifetime mechanical and finish warranty