Voltage: 120V ACAmperage: 6.3AChuck Size: 3/8"No Load RPM: 0 - 2,600Check Design: KeylessBest In Class Power-To-Weight Ratio, Maximum Power At Minimum Weight3/8" Jacobs Ratcheting Keyless Chuck Holds Accessories Exceptionally Well With Minimal SlippingImproved Lock-On Switch Design Is Recessed In Handle To Prevent Accidental Lock-OnNew Soft Grip Handle Design For Added ComfortOversized 2 Finger Trigger Greatly Increases Comfort During UseService Minder Brushes Automatically Stops Tool When Brush Replacement Is NeededSturdy Belt Clip Frees Up Hands To Do Other Tasks