This 50-piece self-tapping thread insert assortment kit is an essential addition to any toolbox or workshop. Made from durable brass, these thread inserts are designed to repair or reinforce stripped or damaged threads in a wide range of materials, including wood, plastic, and soft metals. The kit includes seven different size specifications ranging from M3 to M12, covering a variety of thread pitches and lengths to suit numerous applications. Sizes included are M3x0.5-M5x0.5-L6 (10 pcs), M4x0.7-M6.5x0.75-L8 (10 pcs), M5x0.8-M8x1.0-L10 (10 pcs), M6x1.0-M10x1.5-L12 (5 pcs), M8x1.25-M12x1.5-L15 (5 pcs), M10x1.5-M14x1.5-L18 (5 pcs), and M12x1.75-M16x1.5-L22 (5 pcs). The self-tapping design allows for easy installation without the need for special tools. All 50 inserts are neatly organized in a clear, compartmentalized storage box, making it easy to find the right size quickly and keep your hardware tidy. A must-have kit for mechanics, woodworkers, and DIY enthusiasts alike.