3. High Speed Steel Tap: The thread tap is made of high speed steel material, which has high hardness and heat resistance. 2. Stainless Steel Insert: These thread inserts are made of stainless steel, with galvanized technology, wear and . 1. Inserts and Tap: is professional thread repair tool kit. 4. Standrad Thread: These inserts and tap have standard thread, the general size is suitable for repairing 14mmx1.25mm . 5. Applicable Machine: Tapping is efficient and labor saving, very suitable for gasoline engines, generators, engines, etc., Weight: 0.32187490252 pounds, Manufacturer: Hipzeepo