The Dif-e-Yo KonKave bearing features a patented design with a concave surface for the string. This helps center the string side-to-side in the yo-yo further reducing friction and maintaining very predictable play.

The Dif-e-Yo KonKave bearing uses stainless steel balls and rings which minimizes oxidization of the bearing components to allow for a bearing with long service life and high performance.

All of the KonKave bearings come with a small amount of light oil which imparts a minimal amount of response when new. Use the bearing for awhile and it will break in and play great for a long time.

Three sizes of the KonKave bearing are available. The size "C" is probably the most common and is commonly found in YoYoJam, Dif-e-Yo, many YoYoFactory®, and many metal bodied yo-yos. The size "A" is common in Duncan® yo-yos and is used in some YoYoFactory® yo-yos such as the Velocity and SpeedDial. The size "D" is primariy used by SPYY and HSpin.