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

The Carbine Sandown 4000 Classroom Set combines a durable external knob with an internal lever handle, offering a practical and secure solution for educational and institutional environments. Designed with a tiebolt mechanism for strength and reliability, this set is ideal for high-traffic doors where controlled access and emergency egress are essential.

The classroom function allows the outside knob to be locked or unlocked with a key, while the inside lever remains always free for safe exit.

Key Features:

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

• Combination set: external knob + internal lever handle

• C4 Keyed to Differ 6-pin PD brass cylinder

• Compatible with KeyLine LKW9 (Silca LW5) profile

• TES5 cylinder available for Gainsborough keyway (CLAIC-TES5)

• Heavy-duty tiebolt construction for commercial-grade durability

• Fire rated for up to 2 hours (Tyco tested)

• Adjustable 60–70mm backset

• Stainless steel latch bolt

• Concealed internal fixing

• Suit door thicknesses from 35mm to 45mm

• Supplied boxed in Satin Stainless Steel finish

Keys Supplied:
• 2 keys per lock (when keyed to differ)
• 2 keys total per order (when keyed alike)

A compliant and reliable locking solution for classrooms and other areas requiring secure external control with unrestricted internal egress.