HIGH PRECISION 1PCS 27m ER50 COLLET TIR 0.0004" /10μm CNC ER50 TOOL HOLDER USA

Concentricity is less than. 0002" at face and arbor (TIR). All critical surfaces precision ground. All critical surfaces are precision ground for accurate fit. Run out: 0.0004" / 10 μm. If both quality and cost are your first concern.