Carlson's Sporting Clays Speed Wrench is the fastest choke wrench that allows you to remove and insert chokes in just seconds. They are easy to operate using only your index finger and thumb. Simply tighten the black thumb knob on end of wrench and the choke can be easily removed or inserted. Works great in the field, on your bench, or in any situation when you need to get your choke tubes out quickly. Lifetime Warranty.