i have just bought my first car a fiat seicento 1.1 sx and im looking to put 4x100 wheels on i know that you have to buy wobble bolts but i have no idea what ones to get or have to fiqure it out please help

At least as important as the PCD are the centre bore and the ET of the wheels. If the ET is wrong they plain won't fit (or will need hubcentric spacers). If the centre bore is wrong you'll need spigot rings or the centre bore will be too small and won't fit.

You need to do a lot of checking before you proceed.

Assuming no spacers, you need wobble bolts with M12 x 1.25 thread, about 30mm long (measured between the end of the bolt and the start of the taper).
This may be useful.

Personally I hate wobble bolts, but some folk will differ.

thanks for the help im looking for a nice set of wheels now

Easier fits are FIAT (except Grande Punto, which is 100mm PCD) and modern Lancia and Alfa 4 stud. With those, you can pretty much take it for granted that the PCD and centre bore will be right, so less to worry about.

Hi, the man with the hand extensions spent some time, or not enough ?