This is one of the unique attachments of the Renzetti rod lathe. The rod support has three rubbers edged rollers, two on the lower arm and one on the upper arm. The lower arm cradles the rod blank and also centers it while the upper arm retains the blank position.
The rod support will accept blanks from 1/16" diameter and up. It can be removed or installed in seconds without removing the blank.
Comes with complete instructions. Some assembly required.