If you have door locks that are exposed to the elements, you're going to need this lubricant. It's really nice for keeping them moving smoothly and removes the sticking problems that locks eventually get. The size is nice and the produce it easy to use. First thing, after removing from the blister pack, Shake the tube vigorously and work it with your fingers. Once you've done this, shake the product to the end of the tube and open. Squeeze strongly into the face of the door knob. The graphite will go in the lock and provide all the lubricant you'll need. You may not be able to tell that the product is entering the lock but trust me it is! If you'll look at your hands after you'll see small particles on your hands.
Pros: Durable, Easy to Install, Easy to Use, High Quality