D6 Sports Grind Rail 56" Long 3 Strong Legs Adjustable Height Non-slip Foot Plates For Skateboard BMX Inline Grind rail measures 56" long for an extra long trick 3 strong legs Adjustable height to 6", 7", or 8" depending on how much air you want from the ground Made of durable, square metal tubing for easy gring with center support Non-slip foot plates insure the rail stays while you're on it For multi-sport use: great for skateboarding, inline skating, and biking tricks