Commercial Lever Lockset, Standard Duty Classroom, Satin Chrome Finish, Grade 2, Heavy Gauge Steel Material, For Door Thickness 1 3/8 to 1-3/4 In, Backset 2 3/4 In, Crossbore Size 2 1/8 In, Strike 1 1/4 x 4 7/8 ANSI, Fire Rated 3 Hours, ANSI 117.1 Specification, UL Listed Standards