Model railway track screws various lengths 00 N TT gauges screwdriver track pins
The 'Mini screwdriver' is a small (8cm long) very basic screwdriver. It's cheap for a reason. It is only suitable for 00 gauge 6, 8 and 10mm long screws. My N screws are thinner than my 00 screws and are also suiatable for Hornby TT.