Track, Banked Curve 12" R Set Easy to use. Consistent quality. AFX track has been the standard in the hobby since it was designed and patented 30 years ago. AFX has 21 different types, the other guys have 4 or 5. Z-Bend Rail End  Allows consistent electrical contact even when track pieces are not pushed together completely.Tapered Slot Ends  Smooth, quiet performance as cars pass over track junctions. High Traction Surface  Helps tires get maximum grip. Correct Cross Bracing and Supports  Keeps track stable and junctions solid. Only with AFX track. Deepest Slot Depth  Accepts longer AFX guide pin; keeps cars on the track longer.