Carbine Combination Knob Classroom Lever 60mm - 70mm backset. Sandown 4012 Rosehill with 6012 Classroom Lever. Carbine have developed the combination knob and lever set in various functions. It's a combination of the round Sandown 4000 knob series on the outside and the lever of the Rosehill 6000 series on the inside. As such, it is a tiebolt function.                                                                                                                                                      

Function

• Outside - Opened by knob when unlocked. Key locks or unlocks outside knob but does not retract the latch 
• Inside - Opened by lever at all times

Additional Information 

• Fire rated for 2 hours to Tyco specifications
• Tiebolt fixing
• Suits KeyLine LKW9 (Silca LW5) profile
• Cylinder is a 6 pin PD style brass cylinder
• Adjustable 60mm - 70mm backset
• Suitable for doors 35mm - 45mm in thickness
• Visible internal fixing 
• Stainless steel latch