Item Type: Thread Repair Insert Assortment KitMaterial: 303 Stainless SteelPackage List5 x M8X1 M10X1.5 L12mm Thread Insert3 x M8X1 M10X1.5 L15mm Thread Insert2 x M8X1 M10X1.5 L20mm Thread Insert3 x M8X1 M12X1.75 L10mm Thread Insert2 x M8X1 M12X1.75 L12mm Thread Insert5 x M6X1 M8X1.25 L6mm Thread Insert5 x M6X1 M8X1.25 L8mm Thread Insert3 x M6X1 M8X1.25 L10mm Thread Insert3 x M6X1 M10X1.5 L8mm Thread Insert2 x M6X1 M10X1.5 L10mm Thread Insert5 x M5X0.8 M8X1.25 L8mm Thread Insert5 x M5X0.8 M8X1.25 L10mm Thread Insert3 x M5X0.8 M8X1.25 L12mm Thread Insert3 x M5X0.8 M10X1.5 L10mm Thread Insert2 x M5X0.8 M10X1.5 L15mm Thread Insert1 x Storage Box151 Pieces Set: The set contains 51 pieces thread inserts of different specifications from M5 to M8 for you, could meet your different needs. 2Thread Repair: These thread inserts are used to fit into wire holes to repair damaged threads, and can be used repeatedly. 3303 Stainless Steel Material: Made of premium stainless steel, resistant to corrosion and rust, has good toughness, high hardness and low wear resistance. 4Good Shock Resistant: The thread inserts have certain elasticity and load, good shock resistance, and can avoid loosening. 5With Storage Box: The thread inserts kit comes with a compartment storage box for easy sorting and carrying.