Combination spanner
A combination spanner, also known as a combination wrench, is a hand tool used for tightening or loosening nuts and bolts. It typically features an open-end wrench on one side and a box-end wrench on the other. The open-end has U-shaped jaws that grip the fastener from the sides, while the box-end has a closed loop that provides a more secure grip on the fastener's sides, reducing the risk of slipping. This dual design makes combination spanners versatile and suitable for various applications in automotive, construction, and other mechanical tasks.