WTB Crankshaft rebuilding tools


You can fool some of the people some of the time
Does anyone have any crankshaft rebuilding tools or can recommend where to get them.
PM me please
A good 4 stroke crank is often made from 4340 steel but what kind of steel is used to make these 3 piece cranks from?
The shafts are relatively soft and can be filed quite easily while the crank pin is very hard and can not be filed.