The art of construction deconstructed. Screws and screwdrivers - Len Fisher and fellow experts demonstrate how these metal fasteners are in fact levers.
Discover 11,128,835 listings and 279,851 playable programmes from the BBC
The art of construction deconstructed. Screws and screwdrivers - Len Fisher and fellow experts demonstrate how these metal fasteners are in fact levers.
