F4-68XXG Fast-Moving Special Designed for moving lures like shallow cranks, vibrating lures, and spinnerbaits, the glass construction of the F4-68XXG is built to “give,” and allow the fish that extra split-second of time to take the bait better than with pure graphite. Constructed of a unique blend of glass fiber, the XXG is exceedingly light and durable. The length of the F4-68XXG makes it very easy to cast in every way imaginable, from roll casting to precision-pitching light cranks.