SnapRite^® Fastener Pull-The-DOT^® One Way Button 1/4" is a top-quality, nickel-plated brass button with an open top to be used with the Sailrite^® SnapRite^® System. Pull-The-DOT^® snap fasteners are a special locking snap that will only open from one side of the snap. Use for applications calling for a snap that must be placed at an angle where fabric tension is high. It can be used for either cloth-to-cloth or cloth-to-surface applications.