Circular Saw: We are suppliers of portable circular saw which are very handy tools with a variety of uses. They can sharpen almost any tool. Our Circular saws have a handle with on/off trigger switch, an arbor nut to hold the blade in place, and guards to protect the operator from touching the spinning blade. It is especially important to wear eye protection when operating an electric circular saw. For safety, remember that the teeth are sharp and should not be placed on surfaces that they could damage.