Precision Measurement: Featuring a laser-engraved scale with 3mm/4mm markings, this edge lock and sewing gauge ensures -grade accuracy. Perfect for achieving uniform stitches on straight lines, curved seams, quilting patterns, and decorative stitching. It also functions as a needle gauge and seam measurement tool, enhancing its versatility. Ergonomic Design for Ease of Use: Designed with a thumb-guided sliding mechanism, this sewing ruler offers fatigue-free control during extensive sewing, hemming, or crafting sessions. The snug thumb fit enhances stability and maneuverability, making it an essential 'sewing finger ruler' for precise measurements and guidance. Built to Last: Constructed from high-quality, rugged plastic, this edge sewing lockranding tool is enough to withstand years of use. Whether used as a quilting ruler, DIY stitching guide, or seam guide ruler, it promises without causing user fatigue. Versatile Sewing Tool: This seam gauge replaces the need for multiple sewing gadgets, serving as an edge-stitching guide, measuring gauge, template, and needle guide. It's the ideal tool for crafting garments, arts, and achieving professional precision on curved seams. Ideal for All Sewing Levels: Whether you're a beginner or an experienced sewer, this sewing measuring tool is a must-have. It helps novices develop proper stitching techniques right from the start, while offering experts a tool to achieve results, thus enhancing the overall sewing experience. Color: As Shown Material: plastic Package Contents: 8 x Edge Lock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.