Clamps don’t hold tight on metal tubing

The clamps are not well designed. They clamps slipped on the metal bars of my walker. The clamp screw stripped out before I could get it tight enough to hold a can of pop. I wound up wrapping a piece of rubber around the bar and then carefully tightened the second clamp to the walker. Fortunately there were two holders provided. I can’t honestly recommend this product.

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