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Experience superior accuracy and gripping power with Ultra Precision Collets ER40. These collets offer twice the accuracy of standard precision collets and are ideal for gripping imperial size cutters, such as 3/8". Enjoy the precision you need to get the job done right with Ultra Precision Collets ER40.
| Part # | Inside Dia | Outside Dia. | Clamping Tolerance |
| 27-42128 | 1/4" | 40.8 | 1/4" (6.35mm) |
| 27-42132 | 3/8" | 40.8 | 3/8" (9.52mm) |
| 27-42136 | 1/2" | 40.8 | 1/2" (12.7mm) |
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