Unior Nipple Insertion Tool

ManoMano

UNIOR: Product features The Unior nipple assembly tool is your best friend when building wheels. It’s firm spring enables you - to simply attached the nipple and screw it through a double wall rim on the spoke. This way - you avoid losing nipples between the walls of the rim. The spring is interchangeable - item 1751.1/7T

Amazon

Using this tool one will avoid nipples loosening between the rim walls Easily begin to thread nipples on to spokes Nuts on double-wall rims and spokes with ease