I am new to CNC routing and about to order a Dektop to be shipped to Australia. It will have the 1hp spindle and whatever collet comes standard.

My question is about collets and shank diameter - I'm new to collets as well. What shank diameter does the standard collet support? What are my options with the Shopbot Desktop for using different collets and shank diameters? Is there anything special I need to look out for if buying a collet for this spindle?