This is a high-quality magnetizer/demagnetizer tool designed by General Tools, model number 42021. It is a versatile tool that can be used for both screwdrivers and nutdrivers. It is made in the USA and is a great addition to any toolbox. The tool features a magnetic feature that makes it easy to hold screws and nails in place while working on projects. It also has a demagnetizer feature that allows you to remove the magnetization from the tool when it becomes too strong. This tool is a great choice for DIY enthusiasts and professionals alike.
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