Feature: 1. If a thread error occurs or a damaged female threaded hole is repaired, a threaded insert can be used as a repair method to repair the threaded hole in a cost‑effective manner. 2. It can be used in the manufacturing fields of aviation, automobiles, steam turbines, electronic communications, computers, lamps, molds, mechanical equipment and radiators. 3. Processed with high‑quality materials of stainless steel, wear‑resistant, high‑temperature resistant, and have a long service life. 4. With female thread of M4 x 0.7mm, and male thread of M6 x 1mm, and the length is 10mm/0.4in. 5. It is an effective thread repair tool, package including 10pcs thread inserts in total to meet your daily needs. Specification: Item Type: Thread Inserts Material: 303 Stainless steel Specification: Female thread M4 x 0.7mm, male thread M6 x 1mmLength: Approx. 10mm/0.4in Whether There Has Slot: There is a slot Purpose: Thread repair Case: For example, if the M8 thread is slippery, if you want to continue to use the M8 thread after the restoration, use this method to first expand the M8 thread to the M10 thread, and then use the M8-M10-12 length reducer to change it back to M8, because the material of this reducer is stainless steel, it will make the M8 thread more firm. Package List: 10 x Thread Inserts