Carbine Sandown 4000 Tiebolt Double Cylinder Glass Door Set – C4 Keyed to Differ – Boxed – Satin Stainless Steel

The Carbine Sandown 4000 Double Cylinder Glass Door Set is a high-performance commercial knobset designed for educational and institutional environments. Built on the proven Sandown 4000 platform, it features a durable tiebolt mechanism, double cylinder function, and a C4 Keyed to Differ brass cylinder for added control and security.

Finished in Satin Stainless Steel and supplied boxed, this lockset is fire-rated, tested to 400,000 cycles, and suitable for high-traffic areas requiring reliable and secure access.

Key locks and unlocks the lock from either side. 

Key Features:

• Double cylinder glass door function – key controls outside handle, inside handle always free

• C4 Keyed to Differ 6-pin PD brass cylinder

• Tiebolt construction for enhanced strength and durability

• Fire rated for up to 2 hours

• Tested to 400,000 cycles with no failures

• Supplied boxed in Satin Stainless Steel

• 60–70mm adjustable latch included (127mm backset available separately)

• 75mm rose with visible internal fixing

• Compatible with restricted inline cylinders and high-security systems

• Suits KeyLine LKW9 (Silca LW5) profile

• Suitable for doors 35mm–45mm thick (spacers available for thinner doors)

Keys Supplied:

• 2 keys per lock (when keyed to differ)

• 2 keys total per order (when keyed alike)

A dependable and secure choice for classrooms and controlled-access environments needing double cylinder functionality and long-term durability.