Kel-Tec KSG-NR "4 NOTCH" Hammer Wrench Nut Remover Tool. Easy to use KSG-NR Stainless Steel "4-Notch" Hammer Wrench Nut Remover Tool Safely remove your stock "4 NOTCH" KSG-NR Barrel Nut that is locktited on from the factory. NO impact wrench needed with this tool. Hammer wrench style. Safely slips on over your entire Barrel Nut to firmly hold on as you bang the Nut Free with a simple hammer or heavy weight. Complete directions included to easily do it yourself. All parts CNC Machined from Solid Stainless Steel for superior strength. All parts are Made in the USA by Hi-Tech Custom Concepts! Thank you for supporting US jobs.