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The One Drop 54, named because it is exactly 54mm in diameter is One Drop's first full-size yo-yo. The 54 was the first yo-yo to introduce Side Effects, add-ons to the yo-yo axle to allow the use of spikes, domes, disks and other shapes. The Side Effects also allow the player to change the weight distribution adding more or less weight to the center of the yo-yo.
The 54 uses Flow Groove Pads, a 10-ball bearing and is finished in Pyramatte. Shown here is a prototype model.
