The ER System was designed by REGO-FIX in 1973 and turned into DIN 6499 in 1993. Currently the ER collet is the most used collet system in the world, and it all started right here.
We offer ER collets from ER 8 up through ER 50 in two precision classes, standard (0.0004") and ultra precision (0.0002"). Don't be fooled by cheap imitations and false advertising. REGO-FIX is the ER System.