Functionality: These torsion spring winding bars are designed for controlled winding and unwinding of tension within torsion springs, making them essential for safe adjustments and maintenance of garage doors. Specifications: Each bar measures 1/2'' in diameter and 17.2'' in length, featuring a knurled handle that ensures a secure grip and precise control during use. This design is tailored for both professional and home garage setups. Advantages: The knurled non-slip handle is a key safety feature, providing a firm grip to prevent slipping and potential injuries during operation. This design consideration is crucial for handling the high tension of garage door springs safely. Composition: Constructed from robust 45# steel, these winding bars are built to last. The galvanized finish not only enhances the tool's resilience against wear and tear but also improves its appearance, making it a and attractive addition to your toolkit. Essential Tool: Using these torsion spring winding rods is strongly recommended for anyone needing to replace or adjust garage door springs. They help balance the door weight safely, preventing injuries and property damage during maintenance., Weight: 2.09549380031 pounds, Manufacturer: Hipzeepo