Twist 2 Lock™ by Orscheln provides environmentally friendly Fluid Level Indicators for new EPA emission standard engines and an improvement over the age-old "bottle stop" type dipsticks. Provides an easy to use "twist-to-lock" cap Eliminates oil leakage and "blow-by" Locking cap eliminates loose or lost sticks Prevents dust and dirt from entering the tube Easy to locate "color-coded" caps Available with metal and plastic tubes in wide variety of configurations