Suitable for any clean, flat surface of a lawn mower, chainsaw, or small or large engine car or other vehicle with 5/8-inch, 13/16-inch, 1-1/18-inch, and 1-3/8-inch (1.6cm, 2.1cm, 2.9cm, 3.5cm) valves; 8.9-inch and 8.3-inch (22.6cm and 21.1cm) overall lengths make these tools useful for even installing and removing recessed fixtures or hard-to-reach mini-flood light bulbs