This special hand-turning unit was made by Dr. Peter Clark and based on an accessory first advertised by Lorch as a means of assisting with "Graving" work - a watchmaker's term for what might best be described as "freehand" turning.
The unit consists of a smooth metal plate fastened to the lathe saddle and a series of steel toolholders with plastic-covered bases. For light work a single tool block is used and manoeuvred freely on the plate; for heavier tasks the toolholders are made larger and incorporate a long handle to add stability and leverage. A remarkable wooden lathe, the 'fonly )if only I had a lathe) has been built around this system of hand-controlled toolholders.