what size axle does a yyf boss have?

I stripped the axle in my boss today and I dont know what size I need to buy for it.

Buy the 8mm.

yyf uses .4x7 set screws.

there’s a list of common axles the companies uses somewhere. just got to a hardware store and try stuff.

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See this:

[b]List of useful modification and maintenance guides

Common Yoyo Axle Sizes [/b]

Link: http://yoyoexpert.com/forums/index.php/topic,17792.0.html