ER40 collet is made of high quality carbon steel material, which is strong and durable ER40 collets are alternately slotted from both ends for excellent grip Clamping Range: 1/8, 3/16, 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/16, 1-1/8 inches All critical collet surfaces are precision ground to less than 0.0003 Inch For CNC Workholding Engraving and Milling Lathe Tools ER40 Spring Collet Set 1/8-1-1/8 Inch Carbon Steel Spring Collet Set for CNC Workholding Engraving and Milling Lathe Tools 12 Pack

Feature:
ER40 collet is made of high quality carbon steel material, which is strong and durable
ER40 collets are alternately slotted from both ends for excellent grip
For CNC Workholding Engraving and Milling Lathe Tools
All critical collet surfaces are precision ground to less than 0.0003 Inch

Specifications:
Model: ER40
Precision: 0.0003 inch
Clamping Range: 1/8, 3/16, 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/16, 1-1/8 inches

Package Includes:
12 x ER40 Spring Collet Set