The TRG/SOTIC Barrel Nut Wrench facilitates barrel removal for the Sako TRG-22/42 and SOTIC rifles using the KRG barrel nut. Caliber changes can be done quickly and precisely. It is used to turn the barrel nut without removing the action from the stock. It is intended to be used by those qualified to remove and install rifle barrels. Fits: KRG Barrel Nut only Restrictions: Only to be used by qualified persons Weight: N/A Material: Stainless Steel