Manufacturer Marks USA Model 195FEL-26D-24VDC Lock Functions FEL – Electrically Locked (Fail Safe): Outside always locked electrically. Open by key outside, switch or loss of power. Deadlocking latch by lever inside. Lever only. Door Thickness 1-5/8″ to 1-7/8″ standard Backset 2-3/4″ backset Handing Non-Handed Keying/Keyways MARKS C keyway, 6 pin w/ 2 keys Roses Thru-bolted, 3-1/2″ diameter, spring loaded, automatically adjust for door thickness Strikes 4-7/8″ x 1-1/4″ ASA Strike with curved lip Mode of Operation Fail Safe Electrical Specifications 24V/DC, .21 Amps Certifications ADA Recommended U.L. Listed 3 Hour Fire Rating Warranty Lifetime Mechanical Limited Warranty Weight 7.0000