Spark Plug Thread Hole Repair Tools Metal Inserts m12x1, 25 m14x1, 25 Threaded Kit 14mm Feature:1. Thread Repair Tools: Professional spark plug thread repair tools, including 10pcs of M12 x 1.25 threads and M14 x 1.25.2 tap. Standard sizes: these repair tools have standard thread sizes, suitable for repairing spark plugs with 14mm x 1.25mm threads.3. Stainless Steel Inserts: These threaded inserts are made of stainless steel, with galvanized treatment, corrosion-resistant and durable.4. High Speed Stainless Steel Faucet: Threaded with is made of high-speed steel, which has high hardness and high temperature resistance.5. Applicable machines: efficient and labor-saving, especially suitable for gasoline engines, generators, diesel engines and other machines. Specification:Item Type: Spark Plug Thread Repair ToolsThread Insert Size: M12 x 1.25 (Thread Diameter x Pitch)Thread Insert Length: Approx. 17.5mm/0.7inThread Insert Material: Stainless SteelThread Insert Process: GalvanizedTap Size: M14 x 1.25 (Thread Diameter x Pitch)Shank Shank Diameter: Approx. 9mm/0.4inTouch Full Length: Approx. 102.7mm/4inTouch Blade Length: approx. 31.8mm/1.3inTouch Material: High Speed Steel Packing List:10 x M12x1.25 Inserts1 x M14x1.25 with Tap