A high-end cordless impact wrench turns hours of stubborn bolt-turning into minutes of work. When you find the right kit, you get the battery, charger, and wrench in one box, which saves you from buying parts piecemeal later.
Tool companies usually drop prices during autumn sales events to clear inventory before the end of the year. Keep an eye on price trackers to ensure the $450 retail price actually dips before you pull the trigger.
Remember that the 18-month window is a deadline, not free money. If you have any balance remaining on the card after that period ends, you will start paying interest on the leftover amount.