Review on Enhanced Precision in Workholding - Techniks Super Precision Collet Accuracy for Industrial Power & Hand Tools by Michael Caste

Very good collets. Measured TIR @1/4" from the collet is .004, @3/4" from the collet is .006, @1" (where it REALLY matters) is .008. I don't know, where did they come from ".0002" accuracy maybe in the processing of a collet?I will keep this collet because I like the clamping pressure but I will pay more for Think & Tinker,LTD accuracy in the future.(Precise Bits) - High precision grade - TIR @ 1"-.0002" for over $40.