PRECISION RESTORER - Specially crafted to chase worn and damaged threads, the kit acts as a thread restorer and cleaner, removing stubborn dirt and corrosion without compromising metal integrity. | DURABLE & VERSATILE - Made from high-quality carbon steel for superior strength and durability. Hex-shaped taps and dies are perfect for rethreading; compatible with wrenches, sockets, and suitable for wheel, spindle, axle, and bolt cleaning tasks. | MASTER KIT - Comprehensive master metric and SAE standard thread repair chaser tool set includes: UNC(silver): 5/8”-11, 9/16”-12, 1/2”-13, 7/16”-14, 3/8”-16, 5/16”-18, 1/4”-20; UNF(black): 5/8”-18, 9/16”-18, 1/2”-20, 7/16”-20, 3/8”-24, 5/16”-24, 1/4”-28; Metric(gold): M14x1.5, M12x1.75, M12x1.5, M12x1.25, M11x1.5, M10x1.5, M10x1.25, M10x1.0, M8x1.25, M6x1.0. | ESSENTIAL TOOL - An indispensable tool for auto mechanics, this kit efficiently chases threads on rusty fasteners, bolt holes on automotive cylinder heads, engine blocks, and vehicle bodies, ensuring smooth threading for studs and spark plugs. | ORGANIZED STORAGE - Comes with a systematically organized storage case. The color-coded taps and dies make identification seamless, differentiating between coarse, fine, metric, and SAE chasers and dies instantly. Perfect for both helicoil and external rethreading needs.