Carlson's Choke Tubes Hammer Expander Black. This Hammer Expander made by Carlson's Choke Tubes is balanced and lightweight to help prevent uneven wear of the trigger and sear surfaces. The Hammer Expander by Carlson's has a knurled body which affords you positive non-slip cocking. Carlson's Shooting Accessories are for sale and available for purchase in our online store. Specifications for Carlson's Choke Tubes Black Hammer Expander: Manufacturer: Carlson's Choke Tubes Fabric/Material: Steel Hand: Ambidextrous Finish: Black Features of Carlson's Hammer Expansion: Can be used with rifles shotguns handguns Stops uneven trigger wear Non-slip cocking Package Contents: Carlson's Choke Tubes Black Hammer Expander Wrench Carlson's Choke Tubes Hammer Expander Black 00110