These bobbins of thread are designed to be used with the Speedy Stitcher® Sewing Awl, a handheld tool for repairs and heavy-duty hand sewing. They are wound with high-tensile waxed polyester thread that's made in the USA. The multi-pack contains four bobbins: two in a natural tan color, and one each in white and black. Looking for more quality, USA-made goods? We invite you to check out our article, "Gadgets We Can't Live Without, Crafted with American Ingenuity". Materials: polyester Made in: USA Specifications: four spools of thread: 1x white 1x black 2x natural tan Use: Instructions for use can be found on the Speedy Stitcher website. Further Reading: The Speedy Stitcher® was originally patented in 1909 by inventor Francis Stewart of Central Massachusetts, and it has remained in steady demand for over a century. The Speedy Stitcher is still manufactured in the USA, with nearly all USA-made components like wood handles from Maine, metal bobbins and caps from Massachusetts, and thread from the Carolinas. Each awl is assembled and packed by hand, reflecting a continued commitment to craftsmanship and quality.