Features: Crafted with metal and retro inspired design, this vintage spring clamp for treadle sewing machines ensures stable fabric grip and precisely stitching compatibility across various sewing project. The adjustable spring tension mechanism allows effortlessly adjustment for handling fabric of varying thicknesses, while fit seamlessly integrates with most sewing machine models. Ideal for sewing enthusiasts, and hobbyists seeks authentic manual stitching experience with enhanced control and reduced hand fatigue. Perfect for home workshops, crafting space, or tailoring studios requiring smoothly fabric fixation during intricate embroidery, quilt assembly, or garment repair. Engineered with industrial steel components, this sewing machine spring clamp preserves traditional sewing authenticity while modernizing efficiency through fast release functionality and easy tension adjustments. Specifications: Component: Metal Color: Black Size: Approx. 0.96x0.9cm/0.38x0.35in Weight: Approx. 120g Package Includes: 10Pieces Sewing Machine Spring Clamp note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color