Hi-Tech KSG "4 NOTCH" Barrel Nut Remover Tool A must have tool to safely remove your stock "4 NOTCH" KSG Barrel Nut that is locktited on from the factory. If you have a "6 NOTCH" stock barrel nut, please see our other listing. Our design does not allow the tool to touch the face of your gun keeping it perfectly safe and unscratched. Backside is machined to accept a 1/2" standard socket. You can use a socket wrench or we recommend an Air impact wrench for best results. Spins off in 3 seconds flat. Complete directions included in package CNC Machined from Stainless Steel for superior strength. Made in the USA!