3-IN-ONE  Fast-Acting Penetrant Drip Oil, 4 OZ Fast-Acting Penetrant quickly loosens stuck parts and prevents rust Independent laboratory testing shows 3-IN-ONE Penetrant Drip Oil can penetrate up to 3 times faster, and prevent rust better, than the leading competitors Great for use on tools, hinges, nuts, and bolts. Safe for use on plastics, rubber and metal Squeeze bottle design offers control over the amount of penetrant dispensed. Size is ideal for Automotive, Marine, Home, and shop use Marksman Twist Spout makes it easy to use and apply product exactly where you want it