R8 x 4" ER-20 10 ps/set ER Collet System

10 ps/set ER20 ER Collet R8 Bridgeport Shank + Wrench in fitted Case 

• Wide holding range requires fewer collets and changes
• Unique self-releasing system eliminates sticking
• Suitable for all milling and drilling operations
• Flute holding capability for the highest concentricity and clamping power
• Accuracy to 0.0004"
• The thread for an R-8 drawbar is 7/16(.4375) x 20 tpi
• Complete kits include: chuck holder, nominal size collets, non-slip spanner wrench, and case.
• 10pcs. Set includes the following collet sizes: 3/32", 1/8", 3/16", 7/32", 1/4", 5/16", 11/32", 3/8", 7/16" and 1/2"