COLLET ER20, 1/4″ HOLE

ER20, Hole Size 1/4″.
Tool holding range 0.25″ to 0.211″.
Made of high alloy spring steel.
Hardened surface to 44-48 HRc.
Maximum gripping force with 16 jaws.
Runout precision of 0.0004″ (Concentricity of .0002″).