The spanner, also known as a wrench, is a common tool that is predominantly used to provide a strong grip and mechanical advantage in order to turn objects. Some of the objects that are typically rotated by spanners are nuts, bolts and fasteners. They are also used to keep these objects from turning any further. The most common type of spanner tool is identified as open-ended spanner. Another spanner that is commonly utilized is the ring spanner.
In some contexts, the term ‘wrench’ is applied for those tools that are used to turn non-fastening objects. High quality spanners are typically constructed from chromium-vanadium alloy tool steels. In fact, in most cases these spanners are chrome-plated in order to avoid the fear of corrosion, and also to ease the process of cleaning the tool. Spanners are used for a wide variety of applications.
· Open-ended Spanners
An open-ended spanner is a versatile piece of tool that is predominantly used on most types of fasteners. This is why they are a useful tool to posses at home and also in the workplace. One of the most distinguishing features of an open-ended spanner is that the head consists of two jaws that create a U-shaped profile. Also, the profile of the spanner has two flat sides. Open-ended spanners can turn a variety of fasteners, and this is the reason why open-ended spanners are a must-have hand tool.
· Ring Spanners
Ring spanners are predominantly double-ended and possess offset handles in order to improve its reach towards a nut or bolt. One end of the ring spanner is identical to an open-ended wrench and the opposite is similar to a box-end spanner. The loop of the ring spanner is placed over the head of a nut or bolt in order to loosen or tighten it. This type of spanner is less likely to slip off the fastener.
· Combination Spanners
The combination spanner is a double-end spanner with an open-ended head on one side and a ring head on the other side. This is a combination of the open-ended spanner and the ring spanner. This is the most common type of spanner that is used for household purposes.
· Ratchet Spanners
A ratchet spanner utilizes is a hand tool that allows an open-ended ring head or flare to turn a fastener in a specific direction. A great number of ratchet spanners have arrows drawn on the surface of the implement to indicate the direction in which the tool is to be spun. This tool is extremely useful because they do not need to be adjusted and relocated every time the limit of the turning arc is reached.
· Box Spanners
Box spanners are a type of tool that may be used on fasteners that have a specific shape and size. Predominantly, box spanners have hexagonal profiles and are available in metric and imperial sizes. Due to their elongated shape, box spanners are perfect for turning fasteners in those places that are hard to reach. Back nuts are a common type of object that is fastened with box spanners.