Medeco 20-200H1 Satin Chrome 26D door lock cylinder

Security cylinder for retrofit

The Medeco 20-200H1 is a satin chrome 26D key-in-knob and lever replacement cylinder built for Arrow locks using the original 00 keyway. It fits into existing knob or lever lock sets from multiple manufacturers without replacing the entire hardware. Solid brass construction supports long service life in residential and commercial doors. UL-437 listing confirms the cylinder meets recognised standards for drill and pick resistance.

Sustained physical resistance

Pick resistance and bump-proof performance are maintained over repeated use rather than degrading after a few attempts. The brass body and internal components withstand drilling and other forced-entry methods during prolonged attack scenarios. High security is preserved across the cylinder's operational lifespan because the design does not rely on sacrificial elements. UL-437 certification verifies these qualities under standardised test conditions.

UL-437 listed high-security cylinder

The single specification that determines suitability is the UL-437 listing, which certifies drill and pick resistance to a universal benchmark. Without this listing the cylinder would not meet the same verified standard for high-security applications. Buyers who need a cylinder without UL-437 certification should consider other options. The listing is the decisive factor for specifiers and end users requiring documented resistance.