![27/64" (0.421) ER20 Super Precision Collet (0.0005" Accuracy or Better) - Part # 20-0421-27/64 - Caliber Tooling](http://www.moorism.top/cdn/shop/products/er_c5db7ba8-e230-42ef-b07f-04df07338c8d_1024x1024.png?v=1594510248)
27/64" (0.421) ER20 Super Precision Collet (0.0005" Accuracy or Better) - Part # 20-0421-27/64
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