Carlson's Choke Tubes Sporting Clays Choke Wrench 16 & 20 Gauge. These Choke Tube Wrenches made by Carlson's Choke Tube are easy to operate using only your index finger and thumb. Simply tighten the black thumb knob on end of the Sporting Clay Shotgun Choke Wrench by Carlson's and the choke can be easily removed or inserted. This Carlson's Choke Tube Wrench performs great in the field on your bench or in any situation when you need to get your choke tubes out quickly. Carlson's Choke Tube Wrenches are available for purchase in our online store. Specifications for Carlson's Choke Tubes Sporting Clays Speed Wrench: Manufacturer: Carlson's Choke Tubes Fabric/Material: Metal Country of Origin: USA Color: Black Features of Carlson's Wrench for Sporting Clay: Easy choke tube removal Perfect for the field Can be operated with thumb and index finger Package Contents: Carlson's Sporting Clays Speed Wrench Carlson's Choke Tubes Sporting Clays Choke Wrench 16 & 20 Gauge 06602