A Slogging Spanner 80mm Open End CRV is a heavy-duty wrench designed for tough applications, such as loosening or tightening large bolts or fasteners. 80mm refers to the size of the open end, meaning it can fit bolts or nuts that are 80mm in diameter. Open End means the wrench has an open jaw on one side, which allows for quick and easy use around fasteners without requiring a complete fit over the nut or bolt. CRV stands for Chrome Vanadium, a type of steel known for its high strength, durability, and resistance to wear and corrosion, making it ideal for heavy-duty use. A slogging spanner is designed to be struck with a hammer (or "slogged") to apply more force when loosening or tightening particularly stubborn or rusted fasteners. It is commonly used in mechanical or industrial settings where significant torque is needed.