Swiss Corner Clips are an inexpensive, yet classic contemporary method for hanging prints. Clips are made from strong and durable stainless steel. Just four spring-loaded arms will hold a medium-sized picture up to 30" × 30" and up to 3/8" total thickness. Use sturdy mat board, plywood, or masonite as backing, and framing glass or clear acrylic sheets as a protective covering (not included). Because these clips rely on the rigidity of the glass and backing, foam board or cardboard are not recommended as backing materials as they will compress under the tension of the clips. JBC Imports clips and included cord will support up to 60 lbs. Kit includes four clips, nylon cording, and hanger bracket.