Sapim Nipple driver tool ideal for Sapim Double Square 3,25mm up-side-down nipples. 

Ideal tool for Sapim double square upside down alloy nipples. This tool has rotation marks in 1/4 turn steps on the handle to aid assembly and tightening.

Sapim Double Square (also called Upside Down nipples) are used in deep rims, where the whole nipple is hidden inside the rim for a better aerodynamic profile. This tool facilitates easy assembly, even on very deep section carbon rims.

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