CK-ER11-04.0: RegoFix ER11 4.0mm Metallic Sealed Collet, Range 3.75-4.0

REGO-FIX is the original manufacturer of the ER Collet and continues to make their collets with the highest level of quality and precision. Swiss-Type CNC machines can only be as accurate as the collets and tooling used in them. Don't rely on an inferior copy-cat ER Collet. Trust your precision machining jobs to REGO-FIX. The Original ER Collet.