Extension differs from picture. The model number is correct but the extension is actually two piece with a shaft mounted bushing and is a quick change shank on the shaft instead of the standard shank. The extension cord in the photo appears to be a one-piece extension cord. That being said I think the extension will be more than enough to use with my hole saw arbor as it is heavy duty and holds up well on the arbor. It doesn't look like it's welded on, but there must be something other than a small pin holding the bushing to the stem or it won't hold. I plan to use it very soon. So if it's not excellent, I'll address its shortcomings in an update to this review. Just wanted to point out that the item shown in the photo is different from what I received with that model number.