Corbin Russwin CL3800 series an economical, grade 2 standard-duty lever lockset which provides an outstanding combination of value and performance. It's the ideal lever lockset for standard commercial applications. When used in conjunction with the CL3300 Series extra heavy-duty Grade 1 and the CL3500 Series heavy-duty Grade 1 cylindrical lever locksets, the overall cost of many projects may be reduced without compromising functionality and durability. Lever Release for vandal resistance. Solid cast levers. ANSI Grade 2 certification. UL 3-hour fire rating. Independent lever return springs. Through-bolts on door for solid attachment. Covers ANSI/DHI door prep A115.18 - 1994 "Spider Cut Out". Typical applications include: interior offices, closets. Multi-family housing, restaurants, retail complexes. Non-handed. Door thickness adjustment: standard 1-3/8-inches to 1-3/4-inches; factory set for 1-3/4-inches doors. Lock chassis: steel, zinc dichromated for corrosion resistance. 2-3/4-inches backset standard. Latchbolt: 1/2-inches throw latch with universal "floating" front to fit both flat and beveled doors. 2-1/4-inches by 1-1/8-inches square corner front for 2-3/4-inches backset standard. Auxiliary latch bolt: deadlocking latch bolt prevents manipulation when door is closed. Certification/compliance: ANSI meets A156.2 series 4000, Grade 1; meets A117.1 accessibility code. Federal: meets FF-H-106C.