Good cord locks! Quality materials/construction so they grip well, and have a smooth finish that doesn't snag on fabrics. Opening is plenty large for two strands of 550 paracord. I ordered these in part for those features, but ALSO because they are an oval, vs. round shape, so they are less bulky, and more comfortable in certain settings. Definitely nicer and better quality cord locks than what's found in typical big box stores.