Cosplayers, leatherworkers, and bagmakers rejoice! These ultra-strong SewTites are THE solution to "pinning" your thickest projects – without damaging your precious materials. Use Ultras when our HDs aren't quite strong enough – for gluing or sewing cosplay foams, multiple layers of leather (as thick as .25 inches!), stabilizers like Soft 'n Stable®, or other very thick materials. To use, simply slide the magnet apart, align with the pieces you need to sew together, snap on the SewTites, and sew! No more destroyed pins or messy glues No more permanent holes in your materials Won't leave marks or break like clips Each package includes 5 SewTites Ultras. SewTites Ultra Dimensions: 1.72” x .59" (45 x 15 mm).