This screw replaces the factory fore end screw so you can manually exchange barrels without the need for any tools! This devise is needed for each of your receivers from NEF, H&R, Handi Rifle, for the most popular single shot guns made today! Order more for a discount on shipping.

The best part is you can adjust the tension on your forend while at the range without any tools. 
You can also change barrels without any tools.  I have tried this on several handi rifles and it
works great.   Once you tighten up the screw you can mark it and then adjust to that mark. 
That keeps the tension the same when you change barrels.    
If you buy more than one, extra wingnuts are shipped free.

NER H&R Handi Rifle Forend Screw

1/2 Inch length