D1 = Grade 1 – Heavy Duty
D2 = Grade 2 – Heavy/Standard Duty

The D Series will work in many applications. The D1 version is equipped with an additional solid steel collar, security shield and a wood frame reinforcer. Both the D1 and D2 Series are equipped with a 2″ ADA thumbturn and Heavy Duty Grade 1 anti-saw bolt. Now offering Classroom function and more.

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