Guill Tool & Engineering has introduced a new single-point concentricity extrusion crosshead that uses micro-fine adjustment ...

"Rugosity and concentricity: In urban planning, look to edges, not just the core." ScienceDaily. ScienceDaily, 28 April 2018. <www.sciencedaily.com / releases / 2018 / 04 / 180426141611.htm>.

Hornady’s Lock-N-Load Concentricity Tool not only measures bullet misalignment on virtually any cartridge, but also corrects it.