From the Anvil Aged Bronze Mushroom Knob Set 83944.

Suitable for rim or mortice as the roses are removable.

Knob size 49mm diameter
Projection 49mm
Rose 51mm
Complete with 8mm threaded spindles and screws. having two lengths of threaded spindle (120mm for use with rim locks & 100mm for use with mortice locks) and therefore can be used in a number of different situations around the home.

A solid Bronze knob set in a very traditional mushroom style.

Supplied complete with detachable roses.  a choice of matching escutcheons and thumbturns are also available.

The finish is Aged Bronze.