The Schlage ND TLR Tubular Design Lever Lock is a design option for the D Series Commercial Lever Locks produced by Schlage. Nonhanded, so they can be field reversible, these door handles can fit on either side of doors a 5/8" to 2 1/8" thick. Earning a Grade 1 rating from ANSI, this lock has been tested to withstand over three million uses, much higher than the required 800,000 uses to acheive the rating.
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