Snaps together, stays together on floors, tables, and carpets. No nails, screws, or special tools needed. Nickel silver track with gray roadbed; In addition to many other uses, the 30 Degree Crossing is the centerpiece of a basic Figure 8 track configuration. To make a 76" x 39" Figure 8, you also need 21 pieces of 18 Radius Curved Track and 1 piece of 18 Radius Curved Terminal Rerailer.