1" Diamond Wet Core Bit Extension

Marsoni

M251S

$42.77

Get it in 3 business days with 1 day shipping. Friday, May 29

1" Diamond Wet Core Bit ExtensionAllows for quick and easy extended depth drilling applications To be used with Milwaukee Premium wet core bits Extends core bit drilling depth by 12" Apply anti seize lubricant to threads before use Designed to be used wet Specifications Length 12" Country Of Origin China

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UPDATE: Two tips broke off when unplugging them from the binding post and are now lodged in. Inexcusable and an utterly poor product. Solid connection in the binding post with no wobble or wiggle. They require some force to insert into the binding post, but once they're in they remain snug. I also tried removing and reinserting a few times and the connection remained solid. I've used other plugs in the past that have a softer tip and easily deform after one or two insertions. These do not have that issue.

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Reviewed in the United States on January 11, 2026