INOX RA Round 2-1/2" Rosette, 105 Frankfurt Lever, Grade 2, TL4 - 28 Degree Latch, 2-3/8" Backset, Tubular Passage Set, Satin Stainless Steel (US32D/630) with tough MicroArmorâ„¢ Antimicrobial Coating providing 24/7 continuous hygienic protection for the expected life of the hardware; clean with soap and water, never use abrasives or harsh chemicals..