A 1 and 2 Lane version of a 45 and 30 degree turn entry, respectively, into a 5 Degree Angled Helix, this angle allows for graceful entry into a helix with both 1 and 2 lane tracks, and with a 115mm inner diameter corner track is enough to allow for the track to clear itself as it climbs with 75mm of track clearance. Compatible with all my other track segments