Of all the tools I have used in the past 40 years, the cordless 18-volt Impact Driver is one of my favorites.
It delivers a sudden rotational and downward force, similar to a jackhammer. You will be amazed at how quickly and easily you can drive the large GRK structural screws that we provide with your T-REX connectors. An Impact Driver is a much better choice than the conventional cordless drill driver.
Henry Ford said: " IF YOU NEED A TOOL AND YOU DON'T BUY IT, YOU PAY FOR IT ANYWAY."