What different clay bar with other type clay products as clay towel, clay mitt, clay pads? 
the clay bar is first use to remove contaminants, but clay bar not easy to use than  clay towel, clay mitt, clay pad, clay block. but clay bar still is a professional tool of remove contaminants, clay is the key feature for move contaminants. 

the clay bar let car paints more smooth and shine than other clay towel,mitt, and blocks. 

clay bar is a professional tool for DIY user also car wash shop, professional user. 

clay towel, clay mitt, clay pad, clay block are better for DIY user.