I stuck my collets in a 72-hole rack that's bolted to the lid of a US General cart. The lid is fixed with angle iron; I pulled the gas cylinders. The rack is mounted with the 8-hole edge running vertically; it's a 1/64" set of collets. I labeled the appropriate rows "1/16" and "1/8"; it's quicker for me to scan a row of "1/8" to grab a 1/4, 3/8, 1/2, etc. collet.
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