I am slowing down on builds and selling off some tools. I am selling my Pacific Tool and Guage AR15 receiver lapping tool. I lapped around 5 uppers with this. Its one of the better versions of a lapping tool made. The OD of the main shaft is 0.9985. I am aslking $20, it would be nice if you could through in $5 to help with shipping (its heavy). Thank you.