A spanner or wrench is a versatile had tool with many uses. Primarily, a spanner is used to tighten or loosen various objects such as nuts and bolts by providing a tight grip onto the object itself. The size of the spanner used is determined by the size of the object that needs to be adjusted.
spanners are made from high quality steel or metal and are forged. This means that the metal used to create the spanner is heated and then shaped into the correct size or shape. There are various spanners available and each spanner has a unique use such as a crow's foot spanner, pin spanner, cone spanner and many more.
The most common spanner is an open-ended spanner which has two different sized "U" shapes on each end of the spanner. As each side of an open ended spanner has a different size, each jaw on the alternate end can fit tightly on the bolt or nut that needs fastening or loosening.
Ring spanners provide a stronger grip than open ended spanners as they have enclosed openings on either end. These rings are used to fit tightly around a hexagonal or square shape and are designed to grip the corners of a nut or bolt.
A combination spanner has one open end and one ringed end and both sides are usually designed to fit the same sized nut or bolt. An adjustable spanner or a shifting spanner is an essential and versatile tool as the open end, or jaw can be adjusted to fit different sized nuts and bolts unlike a conventional spanner which size on either end is fixed.
A socket spanner contains various parts and is usually sold in a set. Each set contains a grip handle to which socket heads of various sizes can be fitted to depending on the size required. Socket spanners are mainly used to fasten or loosen nuts and bolts.