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Ringtech manufactures all of our offset straight collets in the USA
Our collets sets are produced in US & Letter sizes in 1/2 size increments.
Internal Holding Straight Collets with Offset Center
US 1/2 size set has 28 collets (4-17) $795.00
Letter 1/2 Size set has 60 collets (E-Z+8) $1,680.00