Tell Manufacturing CL100002 Commercial Passage Ball Knob

The Tell CL100002 Commercial Passage Ball Knob has a satin stainless steel (US32D) finish. It is cylindrical and is steel coated with zinc dichromate, which means it is corrosion resistant. It is grade 2, which means it can handle 400,000 cycles. It is UL listed for a 3 hour fire door. The door thickness range is 1 3/8-inch to 1 3/4-inch. It has a backset standard of 2 3/4-inch and is a standard T strike (1 1/8-inch x 2 3/4-inch). The latch bolt is operated by a knob on either side at all times.