| 摘要 |
Improved chucks are provided for securing a cutting element to a power driving unit. The improved chucks are easy to manufacture and do not require mechanical aptitude or great manual dexterity in order to securely connect the cutting element to the power driving unit. These chucks may be used in combination with various power drive units such as power drills, drill presses, routers, lathes and milling machines, rotary sanders and grinders and other rotating cutting elements.
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