Size does matter! Added to Wojtek Weaponry by popular demand is this loooooong Allen key/wrench so that you can fiddle with your gashole without having to strip off your handguard. At 12" long you will be able to reach the adjustment screw of my gas blocks under nearly any rail size. Since this is a Bondhus product you can rely on the obsessive German quality control to keep you satisfied. Bondhus 25407
Shipping is included with the price as always!