Inclines are flexible and allow a smooth transition from one height to another. To install, center the incline on the Riser, butt sections tightly, pin in place with Foam Nails (WOOST1432) and attach with Low Temp Foam Glue (WOOST1446) or Foam Tack Glue (WOOST1444). Starters are identical pieces that can be used alone or with sets to start your track on an incline.