The Townsteel TRX-L-72-630 Is a Back To Back Ligature Resistant Dummy Lock In a Satin Stainless Steel Finish. TRX-L-72-630 Is a Grade 1 Anti Ligature Lock, available in both 2 3/4" and 5" backsets, and is Ideal For Use In Institutions, Behavioral Health/ Psychiatric Care Units. Townsteel TRX Meets guidelines of the Americans with Disabilities Act, Meets all Grade 1 requirements of ANSI/BHMA A156.2 Series 4000.