<https://hsspindles.com/product/er40-collet-set-5-pieces-3-8-inch-p-n-c-g-38-5p/>
<http://schema.org/description>
"ER40 Collet Set, 5 Pieces, 3/8 inch tooling. Tooling size range is 0.336 to 0.375 inch. High precision, through hardened alloy spring steel."
<https://hsspindles.com/product/er40-collet-set-5-pieces-3-8-inch-p-n-c-g-38-5p/>