For extremely true concentric accuracy, this set of 8 collets, collet holder plate and collet nut comes in a foam lined wooden box.
The sizes are: 2 - 2.5 - 3 - 4 - 5 - 6 - 8 - 10mm
Made from alloy spring steel and fully hardened these ER collets are ideal for many machining applications including boring, milling, reaming, tapping and grinding.
The collet holder plate is accurately bored to fit the spindle nose of PD 250/E lathe.
ER 20 standard, made from alloy spring steel and fully hardened.
The size indicated on the collet is the largest size it can hold and can be collapsed smaller within its collapse range.