This push button has black plastic clips on it that will attach to any 10, 12 or 20 gauge shot gun barrel. This push button also has the spring/volumn control in the inside so you can adjust the volumn/tension to your choice. Attached to the striker peg a small piece of rope that will allow you to work this call right up to the final steps without being detected. If you've ever been in the situation that you needed just a few more steps and the gun was in your hand and you did not have a call available; here's your solution. These retail for $15.00-$18.00.