Split faced flagging is manufactured from rock that has formed in layers, this is also known as free bed flagging and was traditionally used as paving. Today is used as crazy paving and is often used on ornamental projects as a form of cladding. It is a rarely inexpensive product compared to sawn paving but does have the quality of looking natural and wearing well. It particularly suits older style cottages, gardens and walkways. There are many quarries in the Hawkesbury area which only produce flagging owing to the nature in which the sandstone has formed. Earlier forms of flagging was obtained by drilling holes and uses feathers and plugs, blocking the flagging from larger stones. Flagging pieces have come into their own in recent times in the manufacture of book leaf walls.