High Quality: The shrink reducer for high strength carbon steel is made of high quality steel which has hardness, durability, high performance and impact resistance.You can prepare a key to complete this work Easy to use: just turn the lowered release screw to operate the target leprosy patient, and use the key to safely remove the rusted or damaged leprosy patient without damaging the thread, thus solving the disassembly problem Difficulties Impact resistance: It is made of high quality steel, with high hardness and long service life. Corroded or damaged nuts can be safely removed without damaging the threads Wide range of applications: It is suitable for dismantling and removing rusty, broken, damaged, corroded and stuck nuts and for polishing the rear-view mirror. If the nut is rusty, it can be cut with these tools without damaging the thread Multi function: applicable to rust removal, rust removal, nut and bolt painting. The screwdriver provides maximum tightening force to avoid