hi all hope you will be fine this time i having a long problem hope this community will solve

i have made a model of agricultural impliment nemed as ecolo tiger  i have to insert the lock pins in it which are of different sizes i want to make that key of different configuration so that it may work good. these are of 20.30.50.80.and 120 mm dia i want to save it in tool box what is tool box path in c:/ i.e in which folder should i save in C:/ and in which type  and i also want that it should adjust automaticaly as the bolts or nuts present in tool box fit automaticaly where they are draged