These stair climbers make a world of difference when climbing steps and curbs. I should have bought these years ago. I never realized how much climbing traction is reduced by proper stair and curb angles when using these devices. If you are installing them on a Magliner brand hand truck, no drilling is required. And you don't have to delete anything. As you can see from the photos, Magliner has pre-drilled holes for all accessories. Installation on the Magliner brand is ridiculously easy. I suspect other reviewers who have spoken about drilling or modifying have installed these stair climbers on handcarts of various brands. As you can see from the photos, stair climbers are designed for very heavy applications. They are also made from a single piece of aluminum and are therefore very light. Also note that the same climbers can be used on both small wheeled magliners and large air wheeled ones like mine.
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