This part is provided by the original manufacturer for Milwaukee power tools. The metal bearing is used to prevent friction between moving parts, and usually goes inside a gear. The item includes one needle bearing, and please be aware any associated parts are sold separately. Please refer to your models parts diagram for any additional parts.
This is a Genuine OEM replacement Flange Nut used on Milwaukee Grinders. This part secures the Grinding Disk to the unit. A Spanner Wrench (Sold Separately) is used to tighten and loosen this part. It is made out of Metal and it is Sold Individually.