boot seat belt anchorage torx size?

As above really,

I just wondered what size it is as I need to buy a torx socket bit.

Is it the same size for the front seats also?

Cheers.

Do you think this set would have one that fits?

Torx Star Impact Socket Bit Set 1/2 Drive T30 T40 T45 T47 T50 T55 T60 T70 | eBay

Ive never bought any before so am unfamiliar with the sizes.

In my limited experience, the bolts will not come undone if you are talking about the ones through the boot floor. Mini grinder was the only thing that worked for me and then replacing the long eye bolt, clevis and bracket. Everything was rusted solid. Cost about £40 to do both sides from memory.