• Antique (shiny) brass finish • Material: RIng and cylinder: Solid brass; Bolt anti drilling ring: Hardened steel; Strike: steel; Pins: nickel silver and stainless steel • Operation: 90˚ key rotation throws the bolt 1”toward the frame, interlocking two hardened ball bearings with the strike to increase jimmying resistance. • Suitable for two backsets, no need for different parts. • Easy and friendly to install. • Easy conversion between standards and drive-in. • The changeable faceplate has an expanded angle for installation on bevelled doors. • Supplied as standard with 1”(25 mm) throw. • Standards: UL437 - pick and drill resistance, UL - fire rated bolt, Conforms to ANSI GRADE 1