Screws, I thought they were all held on with small rivets which you can still buy from the dealers or ebay?http://www.ebay.co.uk/itm/VW-Golf-MK3-MK2-GTi-Wheel-Arch-Rivits-Rivets-Black-20-/160516353594?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item255f852e3a