Feature:1. Can be used in high voltage switchgear, microwave communication, auto parts, air separation equipment, radiators, etc.2. Ideal for repairing damaged threads, stripping internal threads and forming stronger internal threads in soft metals3. High quality stainless steel + steel, high strength, high precision, wear resistant, environmentally friendly and non-toxic.4. It can prevent loose bolts and is especially suitable for products that require a high insurance factor.5. Easy to maintain, the thread is inserted into the damaged screw hole, and the screw hole can be used normally.Specification:Condition: 100% Brand NewItem Type: Thread Repair KitsMaterial: Steel + Stainless SteelThread Size: 1/4-20uncPackage List:1 x Twisted Drill1 x Handle Remove Tool1 x Install Special Tools1 x Thread Tap1 x Remove Tool4 x 1/4-20 x 1D Screw Sleeve4 x 1/4-20 x 1.5D Screw Sleeve4 x 1/4-20 x 2D Screw Sleeve