Commercial Leverset (Grade 1), Cal-Royal ICGN00-US26D, entry function supplied without keyed IC Core, includes 2-3/4 commercial backset. Lock is compatible with small format types, such as: Arrow, Best, Falcon, etc... Lock function description (Entry): Pushing button in on inside lever locks outside lever; turning inside lever or operating key in outside lever releases button automatically. Inside button may be fixed in locked position by rotating to horizontal position. Inside lever always free.