Our knobs come unsprung. They are solid cast, not hollow and have loose roses to enable them to be used with a rim lock (discard one rose) or use with a mortice lock.
They have threaded spindles to take adjustment for various door thickness and lock firmly with a grub screw. The GRUB SCREW should locate on the V in the shaft and not on the threaded part. Each set comes complete with fixing screws.
For best results the centre of the knob should be a minimum of 3inch from the edge of the door. Heavy Duty latches 4inch or 5inch are recommended for maximum efficiency.

• Knob Size: 57mm x 40mm
• Projection: 65mm
• Rose Size: 58mm
• Spindle Size: 8mm (Threaded)
• Finish: Nickel
• Dimensions: 58mm x 40mm