Tell Manufacturing CL100002 Passage Door Knob, Steel, Satin Chrome

Heavy-duty commercial passage ball knob, satin stainless steel (US32D), complies with ANSI A156.2, Series 4000, Grade 2 (400, 000 cycles), UL Listed for 3 hr fire door. Door range of 1-3/8 to 1-3/4 in. Backset of 2-3/4 in standard. Strike, T-strike (1-1/8 x 2-3/4 in) standard. Cylindrical, steel-coated with zinc dichromate (corrosion resistance). Latchbolt operated by knob on either side at all-times.