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The quality of the knobs are extremely poorly made. I bought them with the hopes of them being a nice new accessory to my newly renovated kitchen. I was wrong, the contractor had to end up buying me brand new knobs from Home Depot to replace ALL of these. Some knobs broke while trying to install them. Other knobs would not tighten so after installation, they would still spin around. I would suggest spending money on a more quality knob.