• Eurospec 'Easy T' Quality Latch.
• High quality mechanism also suitable for un-sprung door handles.
• Will give a smooth, solid action to any handles when fitted for a quality engineered feel. 
• Available in 2 1/2" (64mm), 3" (76mm), 4" (102mm), 5" (128mm) case size supplied with both brass and satin stainless steel forends and strikers.
• Please see our FAQ page for more information on backset size.
• High quality door latch featuring Eurospec's unique 'Easy T' latch reversal system.
• Accommodates bolt through fixings on 3" to 5" (not on available on 2 1/2") version for secure fixing of door handles on a rose.
• Rebate set available for double door or French doors here.
• Fire tested for use on firedoors and supplied with a 25 year manufacturers warranty.

from Eurospec.