Product review (1 stars): it spread it an amazing 1/4". So I am returning it
This tool will expand a spring up to 4 1/2"....not really effective when the spring on your Whirlpool Duet is 4 1/4" to begin with. Yup...it spread it an amazing 1/4". So I am returning it. I ended up doing what another reviewer below suggested. I took two zip ties and inserted one into each end of the spring. This gave me a decent size ring to give my hands some leverage to pull. With 1 clamp holding the spring in place at the top, I was able to pull the spring apart and slide it on. With two people, it would be super easy to do. Save some money and get some zip ties. If you don't have any...send me $50.00 and I will send you two!