This trimming tool is made from steel and has been oil hardened and tempered. It is rust proof and durable for professional potters. This kind of trimming tool is suitable to trim a thin and tight foot ring. In order to best trim a tight foot ring, you have to make the blade as sharp as possible. This tool is easier to sharpen than commercial loop tools.

To sharpen the blade, use a fine file or a sharpening stone, hold the trimming tool firmly at about 30 degrees and file the blade horizontally. Constantly check both sides of the blade with finger tip to make sure it is straight. Do not use high speed motor driven grinders to sharpen this tool as they may damage the blade. 

6.25 inches long overall.