The Venus Deep Offset Ring Spanner Set is a type of hand tool designed for use in mechanical applications. The set typically includes a range of spanner sizes, each with a deep offset ring at one end and an open-end spanner at the other. The deep offset ring provides greater access to bolts and nuts in tight spaces, while the open end allows for quick and easy use on larger fasteners. The set is usually made from high-quality chrome vanadium steel or similar material, which provides durability and strength, and is resistant to rust and corrosion. The spanners are often finished with a polished chrome surface to enhance their appearance and make them easier to clean.