We R Memory Keepers Corner Guides, 4pcs
Corner guides by We R Memory Keepers. Great for boxes, book covers, dioramas, and more! Holds corners tightly while adhesive sets. Work with 0.1" (0.3 cm), 0.07" (0.2 cm), 0.05" (0.15 cm), and 0.03" (0.1 cm) wide chipboard.