SAE & METRIC THREAD REPAIR KIT: The 320-piece helicoil thread repair kit includes tools for both metric and SAE sizes: 1/4", 5/16", 3/8", 7/16", 1/2", M5, M6, M8, M10, and M12. It features drill bits, screw taps, wire thread inserts, breaking pin tool and installation tools, offering a comprehensive heli coil solution

PRECISION RESTORER: This helicoil kit effortlessly restores stripped, damaged, or worn internal threads, It creates stronger internal threads in soft metals, protecting them from wear and damage

EASY TO USE: With a simple 3-step process—drill, tap, and install. The 135° apex angle ensures effective metal penetration for smooth insert placement. Use the installation tools for quick thread repairs, and the break-off tools for a clean finish, making threads ready for immediate use

BUILT TO LAST: The drill bits and screw taps are made from heat-treated high-speed steel (HSS) ensures superior performance, while 304 stainless steel thread inserts ensure strong threads and the rubber-coated tools provide a comfortable, secure grip

WIDE APPLICATION: This kit ideal for repairing internal threads in automotive engines, spark plugs, bearings, and metal holes. This kit effectively restores threads on materials like aluminum, iron, carbon steel, bronze, and more

PROFESSIONAL PACKAGE: Kolvoii helicoil kit includes 280 thread inserts, 10 installation tools, 10 break-off tools, 10 screw taps, 10 drill bits, and 2 hex wrenches. The tailor-made carrying case streamlines storage and transpor