I read reviews that said this bit holder/extension was 5" instead of 6". I figured 5 inches would be enough for my application. However, the extension is just under 4 3/4 inches, not even 5 inches. In fact, the bit's reach only increases by 4 3/8 inches, so a total fail for what I need. If you just need to extend the reach of your tool to 4 3/8", this extender looks good and is a good brand name. I have no idea why it's marked 6".
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