These diamond coated needle files are made from high grade carbon steel and then multi-layer coated with premium grade diamonds. This results in a uniformly dense diamond coating for smooth, even cutting. They are available in a variety of shapes for shaping, smoothing, and deburring metal, glass, stone, porcelain, wood and ceramics; almost any hard material. 5 1/2" Barrete File $9.59 5 5/8" Crochet file $9.59 5 1/2" Equaling (Hand) File $9.59 5 1/2" Half Round File $9.59 5 7/8" Knife File $9.59 5 1/2" Round File $9.59 5 5/8" Slitting File $9.59 5 5/8" Square File $9.59 Complete Diamond Needle File Set $69.59 Thank you for visiting A&M Instruments, Tools and Machining. Please e-mail any suggestions or comments to improve the site, our service, or tool selection. Always wear proper eye protection and gloves when using any cutting or grinding tool. ALL diamond tools last longer if a lubricant or coolant is used during cutting or grinding. Copyright® 2002-2006 A&M Instruments Inc 1-866-264-4287