This is the Tamiya 4x10mm Step Screw, supplied in a pack of 5 pieces. This screw is a genuine Tamiya RC spare part, ideal for maintenance or upgrades of your radio control vehicle. It is compatible with a range of Tamiya models including TA02, TA03, FF01, WR-02, TGX, TG10, TB01, and M01. Part number 50585. Tamiya offers a wide selection of RC spares, parts, and hop-ups, including wheels, tyres, motors, and body shells, to support enthusiasts and ensure the longevity and performance of their RC vehicles.