25 ft-lb max torque and 250 rpm free speed deliver impressive power to get the task at hand done fast. Unique head construction provides improved durability and more consistent performance over the life of the tool. Low-profile forward/reverse control has a wide diameter for easy gripping and also eliminates accidentally changing directions in confined spaces. Ergonomic coupling nut and handle ensure a comfortable grip with no sharp edges. Minimum hose size - 3/8" With 25 ft-lb max torque and 250 rpm free speed,the Ingersoll Rand 105 Series air ratchet offers professional technicians an outstanding combination of value and performance, delivering impressive comfort and durability.