Craftsman Professional 28128 20-volt Lithium-Ion Cordless 1/4" Impact Driver with Quick-Release Collet & LED Light —
Excellent quality, very light and powerful impact driver. The price is bargain in comparison to other named brands such as Makita, Hitachi, etc. It took me less than 3 minutes to drive in 20 4" lag screws on my arbor. Do this job with a wrench and it would take more than 1 hour plus you get a sore hand and wrist for a week.