TOMMARS 49-Piece Thread Chaser Set, UNC UNF & Metric Thread Restorer Tool Master Thread Rethreading Kit

Thread chaser 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): M14*1.5, M12*1.75, M12*1.5, M12*1.25, M11*1.5, M10*1.5, M10*1.25, M10*1.0, M8*1.25, M6*1.0

Special thread repair kit used for chasing worn and damaged threads and cleaning stubborn dirt and corrosion without shaving off metal.

A must-have master thread chaser kit for any auto mechanic for chasing threads on rusty fasteners and bolt holes on cylinder heads, engine blocks, and bodies of vehicles.

Thread chaser set is made of the highest quality carbon steel materials, with strong strength and maximum durability. The dies and taps pieces are hex shaped to use with a wrench or socket.

This master thread chaser set is comes with a storage case to keep everything organized. The taps and dies are color coded for easy identification, which helps you differentiate at a glance between coarse, fine, metric, and SAE chasers and dies.

Professionally engineered for automotive and industrial maintenance, this comprehensive thread restoration kit delivers precision solutions for repairing damaged threads without material removal. The set systematically covers three major thread standards through color-coded organization: silver-finished UNC chasers (5/8”-11 to 1/4”-20), black-finished UNF chasers (5/8”-18 to 1/4”-28), and gold-finished metric chasers (M14×1.5 to M6×1.0). Each chaser is machined from high-carbon steel with hexagonal bases for secure wrench or socket engagement, enabling controlled application of torque during delicate thread-cleaning operations. Unlike conventional taps that remove metal, these precision-ground chasers gently reshape deformed threads while clearing accumulated rust, paint, and debris from critical components. The optimized tooth profile allows mechanics to restore integrity to threaded holes in engine blocks, cylinder heads, and suspension systems while preserving original thread dimensions. Housed in a custom-compartmentalized case with intuitive size and standard identification, this kit eliminates guesswork during high-stakes repairs. For technicians working on aging vehicles or industrial equipment, TOMMARS provides the definitive solution for reviving corroded fasteners and saving otherwise compromised components—all while protecting the manufacturer’s original thread specifications.