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 Another shortcoming of these post pullers is their ineffectiveness at removing posts that are broken off or rotten, or when the post itself is gone and the concrete plug or 'stump' remains and must be removed. Some pullers offer screw attachments - essentially a large eyebolt to screw into the wood - this can function when the post has snapped off due to wind damage or impact but does not work well when the wood post is rotten or deteriorated. Other units offer extractor claws or scissor clamps that are meant to grab the outside of the concrete footing or post plug and tighten their grip as the jack pulls up. Again, these accessories are most effective when the concrete plug is one solid piece - cracked or deteriorating concrete will break into pieces (another hazard!) and not be pulled out. These attachments also require the clamp to be held in place during the jacking process so that they are positioned properly on the post or footing - putting the operator directly in the d