Friction from metal blades cutting metal causes heat. It can cause enough heat that the tool bit and waste chips can weld to the surface of the workpiece, damaging the surface. Heat can also cause the workpiece to bow slightly, throwing off precision cuts, as well as shorten the life of the cutting tools. Waste from cuts, especially in industrial shops, can build up and get in the way of the machining process. Coolants are used to reduce the friction between the cutting edge and the workpiece. Coolant is used to reduce the heat created in the machining process to keep the tool cool and to prevent warping of the workpiece and extend cutting tool life. Reid wants to be your industrial tool source.