Allen hex key wrench, size 3/16" for two piece guide rod systems. This universal hex key may also be used on any 3/16" hex screws/ bolts
**Proper gunsmith fitting required for accurate fit & safe function.**
PLEASE NOTE: If you purchase this item by mistake and would like to return it, we will accept your request. However, we reserve the right to charge you a 10% restocking fee if the item is damaged, scratched, or altered from its original state. Thank you.