In a similar vain to Custom Yo-Yo throws from the late 90s, this very high-quality yo-yo model has small cutouts in the body of each halve. "RhongTo" means Star Fruit in Hakkanese, one of many Chinese dialects.
Released April 2010 by the Taiwanese yo-yo maker Adegle. Uses a size C flat bearing. The response groove in the silver halve is custom engraved with "Made in Taiwan Adegle" and covered with a clear silicone response pad.
Of interest... To see all yo-yos with holes in this museum, in the left panel, click Exhibits.
In the right pane, in the Name/Model field, type holes, then click Browse.