FS39C is a high-quality cutting oil, using highly refined base oils and selected additives, specially prepare to meet the deep-hole drilling and grinding . Selection of active sulfur additives to provide excellent extreme pressure performance, Effectively prevent the tool with the fusion between the iron filings in order to improve product surface finishing and extended tool use life. Products featured in this part of the material used in deep-hole drilling process, under certain conditions it can also be used to low to medium strength alloy steel tapping, hobbing and automatic lathe processing.