Spark Plug Thread Repair Tools Gasoline Engine Metal m14x1, 25 Inserts & Faucet Kit m16x1, 25 Feature:1. Inserts and tap: including 10 pcs. M14 x 1.25 Thread Insert and M16 x 1.25 Tap, is a professional tool kit for repairing spark plug threads.2. Stainless steel insert: these thread inserts are made of stainless steel, with galvanized technology, wear and corrosion resistant.3. High-speed steel: the tap is made of high-speed steel, which has high hardness and heat resistance.4. Standard thread: these inserts and tap have standard thread, the general size is suitable for repairing 14mm x 1.25mm.5 spark plug. Suitable machine: threading is efficient and labor-saving, very suitable for gasoline engines, generators, diesel engines, etc. Specification:Item Type: Spark Plug Thread Repair ToolsThread Insert Size: M14 x 1.25 (Thread Diameter x Pitch)Thread Insert Length: Approx. 17.5mm/0.7inThread Insert Material: Stainless SteelThread Insert Process: GalvanizedTap Size: M16 x 1.25 (Thread Diameter x Pitch)Shank Shank Diameter: Approx. 10mm/0.4inTouch Full Length: Approx. 110.7mm/4.4inTouch Blade Length: approx. 33mm/1.3inTouch Material: High Speed SteelPacking List:1 x M16x1.25 Tap10 x M14x1, 25 Thread Inserts