Gridfinity Pen Mandrel

This is a Gridfinity storage box for a WoodRiver Pen Turning Mandrelhttps://www.woodcraft.com/products/woodriver-pen-turning-mandrel?variant=43407293644938 Available at Woodcraft. NOTE: This model is made for a pen mandrel that is slightly longer that this model, from @schuylab so be sure to measure the length of the mandrel to determine which model will work for you.