There is a piece of steel (wrench) underneath with a small spring that should keep you from stretching the bar too much. When I first opened the package, I pulled out the extension cord and voila! The spring and a small piece of steel flew away. I picked it up again. I loaned it to a guy at work and he did the same thing, just lost the nib. I cut the spring off the handle to replace it, but there just isn't enough lip on the end of the extension to hook that little "key". I fixed this by covering the button and spring with a piece of tape to keep it from flying away and this gave it just enough thickness so it didn't stretch out too much. EXCEPTIONAL customer service. After reading my first review, Mark from Olsa Tools customer support contacted me and promptly sent a replacement. The new one works as it should. Thank you Olsa Tools, a first class company!
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