Blade Base With Performance Tip (Cross Generation Beyblade Part)
This is a part that is meant to be like a bridge between two different generations of Beyblade: Plastic Gen (aka Bakuten Shoot) and Metal Fight. This one allows you to put a Performance Tip from MFB onto a Plastic Gen Beyblade. Ordinarily, there's no way to mix any parts between generations. Note that this is kind of a loose fit. It doesn't seem like its tips are very likely to just fall off in the middle of battle, but it's still something to keep in mind.
One of the pictures included is an example to better demonstrate what the above means. It's a complete beyblade, specifically a Wolborg with this base and a WD (Wide Defense) performance tip attached.
This uses Krumerya's parts since I couldn't find any mfb base parts almost at all. Also credit to Tightskin for the Blade Base and Peg models.
Those Wolborg parts aren't official. Rather, they are of my own design, which can be found here: https://www.thingiverse.com/thing:3757000