Ingersoll Rand 7803AKC 1/2" Reversible Drill 13mm Chuck, Pistol Grip - Special order only. If you need more power in your drill turn to Ingersoll Rand's line of high quality 1/2" (13 mm) drills. Our latest models have speed ranges from 400 to 500 RPM and pump out 0.50 hp (0.38 kW).