Heat-resistant straight pins for precise quilting and patchwork. The Patchwork Glass Head Pins by Clover Needlecraft are essential for accurate piecing and pressing. These fine straight pins feature sharp tips that glide effortlessly through quilting cottons and fabrics without leaving large holes. The small, iron-proof glass heads mean you can confidently press your seams open without the worry of melting your pins. Why You’ll Love It: Heat Resistant: The iron-proof glass heads allow you to press right over your pins while working on blocks. Sharp Precision: A fine 0.5mm steel shaft pierces multiple layers of fabric cleanly and accurately. Convenient Storage: Packaged in a handy, closable case to keep your sewing space organized and safe. Product Specifications: Brand: Clover Needlecraft Materials: Steel needle with a glass head Dimensions: 0.5mm thick by 1-7/16" (36mm) long Includes: One closable case containing 100 size 23 patchwork pins.