Anti-Harm Knob (HSS)

The anti-harm knob is designed for safety and security by eliminating catch points with a tapered knob recessed into the rose, a tapered thumbturn (for mortise lock thumbturn functions) with Torx® pin security screws, tapered cylinder collars and concealed mounting screws. Available as sectional trim, the anti-harm knob features recessed finger holes for a better grip and the reliability of the ML2000 ANSI/BHMA grade 1 mortise lock. Ideal for psychiatric or detention facilities.


  • Recessed finger holes for a better grip
  • Tapered knob recessed into the rose
  • Concealed mounting screws for added security
  • Tapered anti-harm thumbturn standard for all ML2000 thumbturn functions
  • Tapered cylinder collar standard for all for ML2000 cylinder functions
  • Available in 606, 626 and 626C finishes only
  • Available in 1-3/4 - 4” door thicknesses

Specialty Hardware Catalog

Product installation instructions and templates are located in the Library.



Available Finishes

BHMA 606 Satin Brass
BHMA 626 Satin Chrome Plated
626C Satin Chrome Plated with MicroShield®