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https://www.openlearning.com/u..../hammondflynn-skwpgm
DIY Bifold Door Roller Replacement The bifold roller is the most frequent failure problem in internal folding doors. The problem is easily fixable with a simple DIY solution. The rollers are made of stainless steel and are resistant to breakage. They are easy to install using the included hardware. They also have load bearing and are designed to run smoothly. Nylon Wheel Nylon is a Thermoplastic mat