Review on DZS Elec Semi-Insulated Terminal Connectors by Paul Hyde

Good quality. Keep in mind that you're paying $6 for a set of terminals that would normally cost $20 elsewhere. The thickness and rigidity of the metal is adequate if not abused. If crimped correctly, the wires will hold normally. Have realistic expectations for what you are buying. These are just standard binding posts and probably not as strong as those that cost $8 for a small package.