1、The screw sleeve are made of stainless steel, good corrosion resistance. 2、Wire thread sleeve is a new type of internal thread fastener made of high strength diamond section steel wire. It can improve thread strength and wear resistance when applied to low strength engineering materials such as aluminum alloy, magnesium alloy, 3、Used in various low strength materials, which can improve the wear resistance of bolt connections and avoid the damage of thread 4、Strengthen the connection strength and improve the connection condition, avoid sliding wire, wrong tooth phenomenon, and obtain excellent connection performance. 5、In the case of incorrect threading or damaged internal thread repair, the threaded hole can be effectively repaired by using the threaded screw sleeve as a repairing method. Feature: The screw  sleeve are made of stainless steel, good corrosion resistance. Wire thread sleeve is a new type of internal thread fastener made of high strength diamond section steel wire. It can improve thread strength and wear resistance when applied to low strength engineering materials such as aluminum alloy, magnesium alloy, copper, plastic, electrician, etc. Used in various low strength materials, which can improve the wear resistance of bolt connections and avoid the damage of thread All the screw sleeve are placed in a box for easy carrying. Strengthen the connection strength and improve the connection condition, avoid sliding wire, wrong tooth phenomenon, and obtain excellent connection performance. In the case of incorrect threading or damaged internal thread repair, the threaded hole can be effectively repaired by using the threaded screw sleeve as a repairing method. Specification: Material: Stainless steel Product size: M7*1*1D, M7*1*1.5D, M7*1*2D, M7*1*2.5D, M7*1*3D Package list: 100 * Coiled Wire Screws Sleeve(Each size * 20, 5*20, 1 Box) Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.