Lisle device is designed for working with a vehicle’s brake system, specifically for turning and pressing in the caliper piston. It’s especially useful when the piston is deeply recessed and inaccessible by standard methods. The construction is a steel cube with protrusions on each side, each fitting different types of brake calipers. The tool is universal and compatible with most vehicles. It can be used with a 3/8-inch drive wrench or ratchet. Using the socket minimizes the risk of damaging the piston and the sealing components.