They have treaded spindles to take adjustment for various door thicknesses and lock firmly with a grub screw. Each set comes complete with fixing screws, which are concealed for improved appearance,together with two escutcheons. For best results the centre of the knob should be a minimum of 3'' from the edge of the door. Heavy Duty latches 18299/4'' or 18299/5'' are recommended for maximum efficiency.
Sold as a set and supplied with necessary fixing screws. The GRUB SCREW should locate on the ''V'' in the shaft and not on the threaded part.