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50-PIECE METRIC ASSORTMENT: Includes 7 common metric insert sizes for thread repair and reinforcement projects: M3x0.5 to M5x0.5 L6, M4x0.7 to M6.5x0.75 L8, M5x0.8 to M8x1.0 L10, M6x1.0 to M10x1.5 L14, M8x1.25 to M12x1.5 L15, M10x1.5 to M14x1.5 L18, and M12x1.75 to M16x1.5 L22. 303 STAINLESS STEEL BUILD: Made from 303 stainless steel with a smooth silver finish, these threaded inserts are designed for repeat fastening, thread reinforcement, and everyday repair work in workshops, garages, and maintenance kits. SLOTTED SELF TAPPING DESIGN: The outer thread helps cut into the prepared hole while the inner thread creates a new machine-thread connection. For best results, measure with a caliper, drill the correct pilot hole, and keep the insert vertical during installation. FOR SOFT BASE MATERIALS: Suitable for repairing stripped internal threads or adding stronger threads in plastic, aluminum, copper, wood, and similar soft materials. Not intended for safety-critical, suspension, aerospace, or high-load structural applications. SORTED STORAGE CASE: Comes with a divided plastic case to keep sizes separated and easier to identify during repair work. Installation tool, drill bit, tap, and wrench are not included; please check the size chart before ordering and before installation. ASIN B0GZT36ZJP Brand Yulatik Set Name 50-Piece Metric Thread Insert Kit Unit Count 50 Count Part Number Car-GS06573-US Thread Type Iso Metric Manufacturer Carkee Fastener Type Female Threaded Material Type Stainless Steel Exterior Finish Stainless Steel Item Dimensions 6.63 x 3.12 x 1.17 inches Number Of Items 50 Number of Packs 1 Number of Pieces 50