Magnetoplan Catch-Ball Aluminum Clamping Rail, 500 mm. Elegant clamping rails made of anodized aluminum for office, workshop, and private use. For quick and secure attachment of notes, photos, plans, etc.: Paper can be quickly fixed and removed undamaged with just one hand. Up to 30 sheets of paper can be easily clamped from below into the Catch-Ball rail. The technical glass balls in the clamping rail securely hold the papers solely by their own weight. The top edge of the Catch-Ball rail also serves as a shelf for pictures, pens, etc. The rails can be expanded side by side as needed. Available in anodized aluminum or plastic in white, each with a self-adhesive back or can also be mounted with screws.