http://www.alansrobinson.co.uk/model%20railway%20track%20pins%20and%20track%20screws.html
Quote from their website:
OO/HO gauge model railway track screws - so much better than track pins.
00 gauge track screws are also suitable for scalextric track fixings in place of track pins.
UK Prices, P+P included.
You can have a mixture of different sizes for the same price ie 100x6mm + 100x8mm + 100x10mm = 300 screws £5.20 - excludes 14mm.
The 'mini' driver is ONLY suitable for 6, 8 and 10mm 00 gauge screws.The 'Blue' driver is only available for 00 gauge screws. The 14cm driver and 'ergonomic' are availble in differnt sizes for all screws.