All-in-One SAE & Metric Threading Kit:Kolvoii 81-piece tap and die set includes both SAE (#4–1/2") and Metric (M3–M12) coarse and fine threads. Designed for cutting, repairing, or rethreading threads—versatile for fastener or hole repair task
Industrial-Grade GCr15 Steel: Made of industrial-grade GCr15 bearing steel, heat-treated to 60 HRC for exceptional wear resistance and strength. Withstands high torque without deformation. Engineered to ultra‑tight tolerances, it delivers the precision and reliability professionals demand
Precision CNC Machined Teeth: CNC-ground cutting edges provide clean and accurate threads across materials like steel, aluminum, brass, copper, and cast iron. Reduces friction and cross-threading for smoother, faster thread repair
Dual Pitch Gauges & Extractors: Includes both metric and SAE pitch gauges for fast thread identification. Spiral flute extractors (EZ-Out type) help remove broken bolts and studs easily without damaging existing threads, saving time on repairs
Adjustable Tap & Die Wrenches: Adjustable wrenches fit multiple tap and die sizes with secure locking and fine-tension control for precise alignment and steady threading under load
Complete Accessory Kit: 68 Taps and dies, long handle tap wrench, T-handle tap wrench, adjustable die wrench, screwdriver, metric and SAE thread pitch gauges, centre punch, 5 spiral flute extractors—all neatly stored in a rugged blow-molded case
Versatile for Multiple Applications: Ideal for automotive repair, machinery maintenance, and general metalwork. Suitable for creating or restoring threads on bolts, rods, and holes—essential for professionals and DIY repair tasks