Designed solely for use in the engineering industry for use with diamond abrasives and used for more than 30 years.WD 40 or other such lubricants are too thick and result it your tool skating over the diamond surface.Suitable for use with all quality diamond abrasive products. Use instead of water to reduce the threat of rusting by 95%. Reduces possibility of clogging and improves diamond performance. Size=100 ml Hazard type=Harmful (Xn).