Inserts and Thread Cutters: including 10 pieces M14 x 1.25 thread inserts and a M16 x 1.25 tap, is a professional tool kit for repairing spark plug threads. STAINLESS STEEL INSERT: These threaded inserts are made of stainless steel, with electroplated technology, wear and corrosion resistant. High Speed Steel Tap: the tap is made of high-speed steel material, which has high hardness and heat resistance. STANDARD THREAD: these inserts and taps are standard thread, the general size is suitable for repairing 14mm x 1.25mm spark plug. Applicable Machine: the thread cutting is efficient and labor-saving, very suitable for petrol engines, generators, diesel engines, etc. .
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