The Notched Rim Diamond Saw Blade may be an economy priced blade, but it cuts like a premium diamond blade. It features a standard notched rim design that provides a smooth cut that can even take on hard stone like Brazilian agate. For best results, use an oil based coolant for longer life and ease of use. About Kingsley North, Inc. Since 1939, the expert staff at Kingsley North has the gathered the best lapidary equipment, supplies, and accessories for rock-hounds and hobbyists: rock tumblers, diamond trim saws, faceting equipment, and much more. Kingsley North also carries a full line of jewelry findings: cabochons, cotton filled jewelry boxes and gemstone display cases. Their thorough offering of books and videos help turn the curious beginner into an expert. If your hobby or business involves lapidary art, Kingsley North has everything you need. Economy priced 6-in. blade Standard notched rim design Cuts hard stone Use oil based coolant for best results