Keylex 2100SC 60mm Backset with Passage Keylex 2100 60mm Satin Chrome • Suitable for extreme heavy duty applications • Prevents unauthorised entry to restricted areas • Over 16,000 possible combinations • Operates by knob from both sides • Stainless steel buttons will not indicate usage • Passage facility (By code) supplied as standard • Mechanical operation - no wiring or batteries required • Used widely on Police Stations, Banks, Building Societies and Hospitals