u need a mcphearson strut tool, halfords and the motorist centres sell them, you also need a blig allen key on the inside of the nut on the strut-top. i didnt have a ring spanner when i did mine, i found a deep socket with a hex on the end, put the allen key down the centre of the socket, and used a normal spanner on the end of the socket. you need 2 hold the allen key still and un-do the outside nut. hey-presto!