You are Buying a Brand New And Factory Sealed PDQ Grade 2 Cylindrical Locks SD SERIES Most Valuable Grade 2 On The Market. Specs FOR DOORS: 1-3/8? to 1-3/4? thick Preset for 1-3/4? door APPLICATION: Through door thru-bolting Fits standard 160 and 161 Door prep Thru-Bolts are removable BACKSET: 2-3/4? standard 2-3/8? optional CHASSIS: Heavy-gauge cold rolled steel mechanism Dichromated for corrosion resistance FRONT: 2-1/4? x 1-1/8? or 2-1/4? x 1? Beveled 1/8? on 2? Stainless Steel or Wrought Brass STRIKE: ASA standard T-Strike or Full Lip Strike optional Stainless Steel or Wrought Brass ROSE: 3-3/8? DIA Wrought LATCHBOLT: 1/2? Throw ROSE: 3-3/8? DIA Wrought LATCHBOLT: 1/2? Throw INTERCHANGEABLE CORE: 6 or 7-pin Compatible with Best, Falcon Arrow. Not available with Memphis lever. CYLINDER: 6-pin Brass Insert Cylinder keyed to 5-pins KEYING: Options: MK, CMK or GMK / Zero Bitted (KO), Keyed Different (KD) or Keyed Alike (KA) Can be keyed into existing master key systems FINISHES: 605 (US3) Bright Brass, 613 (US10B) Oil Rubbed Bronze, 622 (US 19) Flat Black, 626 (US26D) Satin Chromium CERTIFICATIONS, LISTINGS COMPLIANCES: UL/CUL 10C listed for 3 hrs, for single doors up to 4?0? x 8?0? Certified to ANSI/BHMA A156.2-2003 Grade 2 Complies with ADA (Americans with Disabilities Act) and ICC/ANSI 117.1 for Accessible and Usable Buildings Meets requirements of the Buy American Act. WARRANTY: Five (5) year Limited Warranty