Hornady 391913 Mandrel Neck Turn Tool 6mm
https://www.tandktactical.com/shop/090255919134-hornady-391913-mandrel-neck-turn-tool-6mm-30806
https://www.tandktactical.com/web/image/product.template/30806/image_1920?unique=596d25f
Hornady Mandrels are required for use with the Hornady neck turning tool. They are used to properly align cases when being turned.
