Be confident in your purchase, we're a Certified Fiam dealer through ASG. How cool is that! Features: Innovative design insures reliable motor starting even at low air pressure Low vibration levels Does not overheat in difficult, heavy duty conditions, repetitive start/stops or repetitive reversing Highly effective due to compact size, high power output and low air consumption Designed using materials and processes that minimize the effects on the environment Drive shaft diameter: all drive shafts include a UNI 6604 Form A key slot ?aov= 10mm for 20M and 28M Specs: Model No.: 20M58R-D10 Reversible: Yes Power: 160 Watt / 0.21 hp Speed at Max. Power: 300 rpm Torque at Max. Power: 50.45 lbf·in / 5.7 N.m Static Torque: 66.38 lbf·in / 7.5 N.m No Load Speed: 580 rpm Air Consumption at Max. Power: 10.6 cfm Weight: 1.19 lb / 0.54 kg Built for heavy-duty applications, repetitive start/stops, and reversing tasks, the Fiam 20M58R-D10 5.7NM/580RPM Smooth Air Motor Output Shaft won't overheat or compromise performance.