The SARGENT 6500 Line is a standard duty key-in-lever lock designed to exceed the requirements of ANSI A156.2 Series 4000 Grade 2. Specifications For Doors: 1-3/8" (35mm) to 1-3/4" (44mm) only Backset: 2-3/4" (70mm) standard; 2-3/8" (60mm) optional (20- Prefix) Cylindrical Housing: Steel zinc dichromate finish Front: Wrought brass and stainless steel; 2-1/4" (57mm) x 1-1/8"(29mm) Strike: 600 Curved Lip, Brass or Stainless Steel Standard Hand: Universal, not handed Latch: Brass 1/2" (13mm) throw Keys: Two, nickel silver Cylinder: Brass, 6 pin, LA keyway standard