Flat‑head numbered pins #11–20 help organize quilt blocks, rows and columns so layout order stays accurate. The fine, sharp 43 mm (1 3/4") shafts glide through layers with minimal shifting and the printed heads accept marker if you need additional symbols. Packed in a convenient case for storage between sessions; a simple system that prevents mix‑ups during piecing and assembly. Designed for accurate setup and repeatable results; ideal for classes, guild kits and retail demo bars.