Drills are classified as being for light, medium, or heavy duty work. They start at 2 amps and go up to 5 amps. It is a good idea to purchase a drill that has more than one speed. This will give you more control when you are using it for various projects. One speeds do work well, but sometimes it will take you longer when you are doing a project. Disc sanders are commonly used for grinding. They require a stone or disc depending on the material you are working with. Orbit sanders use sandpaper. It comes in a variety of sizes and grades. The grade of sandpaper is determined by the number of sand granules on each square inch of the sand paper. The lower grade numbers mean it is coarser. Always be aware of your surroundings and the potential for accidents and injuries. They can happen no matter how many times you have picked up that power tool and used it without incident. Cords are a common hazard when operating power tools. They can get in the way and accidentally get severed. There is also the potential of tripping over them and getting injured. You can help reduce your chances of being involved in a power tool accident by using each one only for intended uses as outlined by the manufacturer. You should also heed their recommendations for the proper safety equipment to use while you are operating a particular power tool. The most common power tool accidents involve injuries to the fingers. The fastest Dremel yet is the Lithium-ion Cordless model. This is the fastest and strongest cordless rotary tool available on the entire market. That is quite an accomplishment for the Dremel Corporation. The battery will stay charged for up to two years at a time. A very fun specialty Dremel is the orange and black pumpkin carving Halloween Dremel. The most common type of power saw is the chainsaw, used to cut down timber. They work well if you need to trim your trees or cut them down for firewood. On draw back of chainsaws is that the cut is often ragged so there is a great deal of splintering. Circular saws are used for a variety of home improvement projects.