Hitachi G18MRP9 7-Inch Angle Grinder, 15.0 Amp with IDI Technology, No Lock On Switch (Discontinued by manufacturer) IDI (Internal Double Insulation) Technology prolongs tool life by providing a durable metal housing, reducing vibration and extending brush life, while realizing the double insulation characteristics of plastic housing tools 15 Amp motor, forcible output power (3,500W) for the toughest grinding jobs Tool-less wheel guard can be adjusted to desired angle Sealed armature coil reduces wear caused by dust and debris for longer tool life Dust-resistant labyrinth construction prolongs armature, switch and bearing life Ball bearings seated in iron retainer for greater durability Three position adjustable side handle reduces vibration 11.9 lbs, lightweight design facilitates maneuverability