FN/FAL front site adjustment tool The best tool for your FAL..... EVER! New production gas and sight tools for your FAL. Made of .4140 steel and are heat treated (Strong tool) for a long life of great performance. 3 1/2 inches long and are about 1/8 inch thick. Works on both the gas adjustment and the gas tube nut as well as giving you a great front site adjustment tool.