Our Diamond Files are made of monocrystalline diamonds and their strong, single-crystal structure does not break apart with use. If you want to use a lubricant, use only water. To clean them just scrub with a bristle brush and dishwashing soap. The red file is fine and will put a razor edge on your cutting tools. The blue file is coarse and will sharpen blades like a normal file. Total length is 7" long and the file area measures 2-1/2" long which takes up very little room in your toolbox.

WARNING: This product contains a chemical known to the State of California to cause cancer. For more information go to http://www.P65Warnings.ca.gov