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# Installing Items on SplineXS
The SplineXS has an 8mm OD, which means the shaft fits into a standard 8mm ID bearing. This features allows teams to better support the end of the SplineXS shaft when the application demands it.
## Installing Items
The SplineXS shaft on the Kraken X60 has a #10-32 tapped hole at the end, perfectly designed to fit the #10-32 x .250" L PHCS ([WCP-1740](https://wcproducts.com/products/bolts)) offered by WCP.
{% hint style="info" %}
Use a combination of Kraken Spacers so that the pinion does not move on the SplineXS shaft.
{% endhint %}
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