Product Description Brand new Unified 4 - 40 to 3/4" - 10 Helicoil Thread Repair Drill and Tap 12 Inserts Including: Tap, Drill, 12 Inserts Stainless steel inserts are 50% stronger than the original thread. You can select the size "Buy it now". Please check our store for other size. If there is anything you need, do not hesitate to contact us. There are a variety of sizes available but they are not all listed.