Features: working principleThis thread repair set can be place in the screw hole of the workpiece such as aluminum to form a standard internal thread with high strength, wear resistance and high precisions. stainless steelThread inserts produced of high-strength -shaped steel wire with high strength and wear resistance. 120pcs in different sizeThis thread insert set contains 60pcs inserts from 3mm to 12mm which can meet your different needs. wide applicationsThis thread repair set can be widely used for high voltages switches gear, microwave communication, automotive parts, aerospaces precisions parts, electronic products, air equipment, radiators, etc. Suitable for DIY enthusiasts, professional handymen, and mechanics who demand reliability and strength in their fastening solution. Specifications: Material: steel Quantity:120 Size: About (inner diameter x thread pitches x length), 2D= 2 x inner diameter M3x0.5x2D(20pcs) M4x0.7x2D(20pcs) M5x0.8x2D(20pcs) M6x1.0x2D(20pcs) M8x1.25x2D(20pcs) M10x1.5x2D(10pcs) M12x1.75x2D(10pcs) Note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item. Package includes: 120pcs Threaded Insert