Torsion spring winding rods are designed for wind or unwind torsion spring.This is an indispensable tool for adjusting the torsion spring to keep balance the weight of a garage door and avoid possible injuries.Winding bars are equipped with a black non-slip rubber handle, which allows you to better control and use them comfortably and safely.Made of strong steel, more durable. Designed to industry standards for residential garage doors.Package includes 1 pair winding rods. Dimension: 16”(L) x 0.47”(Dia.). Product Description Torsion spring winding rods are an indispensable tool for replacing or adjusting the torsion spring of a residential garage door. Ergonomic design, made from durable steel, with non-slip rubber handles, safer to use. Product Specification: Quantity: 2 x Torsion spring winding rod. Material: Steel (Tips: Torsion spring winding rods come sort of oil to prevent rust.) Dimension: 16”(L) x 0.47”(Dia.). WARNING: Incorrect installation or door position could cause injury, torsion spring rods are not for use on winding cones larger than 33/64" in diameter. 16" length offers additional leverage when turning the springs The rubber non-slip handle is designed to provide complete control for safe installation. Torsion Spring Winding Rods is the tool to make torsion spring adjustments to balance the weight of a garage door. Failure to use these rods when replacing or adjusting torsion springs may result in personal injury. Winding cones should be wound and unwound 1/4 turn at a time. Torsion spring rods are not for use on winding cones larger than 33/64" in diameter. Material Steel Steel Steel Steel