A cutting tool is a hardened, sharp-edged tool made from metal that for use to remove (shape and cut) layers of a workpiece’s material to achieve a desired size, shape, and accuracy. This is done using machining tools and abrasive tools for shear deformation.  When machining, there will be a relative velocity between the cutting tool and the workpiece from mechanical and other mechanisms. Therefore, heat and force produced during this process will need to be withstood by the tool, and the material of the cutting tool will need to be harder than the workpiece. The tools will also require accurate geometry with clearance angles to ensure the surface of the workpiece is only in contact with the tool’s cutting edge. For this reason, significant factors to consider include the shape, number, and width of the teeth or flutes, together with the cutting face’s angles. Optimising these variables alongside the machine’s speed and feed will ensure a longer lifespan of the cutting tool.  As well as the use of these tools in milling machines and lathes, there are a good selection of tools designed for trade and DIY users. As each user has different requirements of the product, time constraints, and a number of other factors, trade and DIY users can choose cutters with the desired features.