Carbine Sandown 4000 Tiebolt Classroom Set – C4 Keyed to Differ – Boxed – Satin Stainless Steel

The Carbine Sandown 4000 Classroom Set is a heavy-duty commercial knobset designed for educational facilities and controlled environments. Built with a reliable tiebolt mechanism and equipped with a C4 Keyed to Differ 6-pin brass cylinder, it provides secure external control while ensuring free internal egress at all times.

Finished in Satin Stainless Steel and supplied boxed, this classroom function lockset is fire-rated and cycle tested for long-term durability in high-traffic areas.

Key Features:

• Classroom function – key locks/unlocks outside knob; inside knob always free

• C4 Keyed to Differ 6-pin PD brass cylinder

• Tiebolt construction for enhanced strength

• Fire rated for up to 2 hours

• Tested to 400,000 cycles with no failures

• Supplied boxed in Satin Stainless Steel

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

• 75mm rose with visible internal fixing

• Suits KeyLine LKW9 (Silca LW5) profile

• Compatible with restricted and high-security key systems

• 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 safe and compliant solution for classroom and institutional environments requiring controlled external access with guaranteed internal egress.