"S" Series Medium Duty Commercial. 6 pin tumbler with 2 keys per lock. Stock locks keyed 5 pin. Universal backset latches fit either 2-3/8" or 2-3/4" backsets. Adjustable for flat or bevelled doors. Latches have a 1/2" throw. Door Range: 1-3/8" to 2". Snap-on inside rose conceals mounting screws. Square corner T-Strike, 1-1/8" x 2-1/4" x 3/32", with 1-1/8" lip, furnished with dust box, #10-001 is standard. Field reversible. Certifications: ANSI A156.2, 1989, Series 4000 Grade 2. UL Listed for all functions up to 3-hour doors.