6 Pcs. Parlec CAT 50 ERos 20 x 6.00" Extrem High Precision CNC Collet Chuck Kit
Parlec ERos 20 Roller Collet Chuck Wrench. ERos® is ER ON SIZE. ER 20 Collets (Your Choice) & Roller Collet Chuck Wrench. ERos® Collet Chucks. ERos® System. The ERos® collet system is one of the best collet chucks that money can buy.