COLLET ER40, 3/16″ HOLE

ER40, Hole Size 3/16″.
Tool holding range 0.188″ to 0.148″.
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″).