I will have to offer two scenarios:
1) The pocket looks wide enough for a backhoe bucket, so I think it's a spear of some sort on a backhoe. I like the previous poster's idea of a reel spear, perhaps for unspooling.
2) Probably the more likely use is a rather oversized olive spear for the worlds largest martini! I like the thought of three olives rather than two, based on three sets of retaining fingers.