If you do not have good manual skills with steel or prefer not to use a steel sharpener, you can use a sharpening machine. Ceramic sharpening machines. Two ceramic discs sharpen your knives when the blade passes. They have a pre-set sharpening angle, there is no possibility of error in the inclination of the cut.Blades turn slower when they're duller, leading to a strained motor that can overheat your tools. Without regular tool sharpening, your tools will be put under more strain that can cause them to break much sooner than they would have if you had kept them sharp.