"48"" Expandable Grind Rail, Now you can learn to do the same tricks the big guys do! The Power Deck Grind Rail is designed for years of fun and tons of tricks Challenge your friends! Put on a show! The adjustable height lets you start off close to the ground until you master the magic of grinding your board then you can raise it up to make it more challenging. Learn nose grinds, backslides, tailslides, and many more!Easy to build and store, and it's expandable! Just add on another Power Deck Grind Rail for extra length which means extra fun!" Case Pack 4