This is the only truly useful part of Wolborg. It is the successor to Metal Dragoon Bearing Stinger in the sense that it has a free-spinning shaft supported by bearings. This system reduces the loss of spin that occurs when it is hit by another Beyblade. Unfortunately, in the trade-off of being able to replace the SG shell with a Left SG shell, you can only place one bearing in the shaft casing. Metal Dragoon Bearing Stinger allowed for the placement of two. However, Burning Kerberous and Takara's Zeus casings rectify this problem, as they can carry two bearings, though neither works effectively with this Shaft.