"The Klutch 18V Lithium-Ion Cordless 4 1/2in. Grinder delivers maximum power and up to 6500 RPMs for the most demanding applications. Lithium-ion batteries are 20 lighter weight, hold charge 4X longer and deliver up 2X the run time of traditional Ni-Cd batteries, so you'll have more than enough power to complete the job. Battery Included Yes, Case Included No, Product Type Handheld, Side Handle Yes, Speed RPM 0-6,500, Spindle Lock Yes, Spindle Thread Size 5/8 in.-11, Switch Type Trigger, Variable Speed Yes, Wheel Diameter in. 4 1/2, Wheel Included Yes, Wrench Included Yes. 0-6500 RPM variable speed Interchangeable battery platform batteries fit all NEW Klutch cordless tools Lithium-Ion batteries are 20 lighter weight, hold charge 4X longer and deliver up 2X the run time of Ni-Cd batteries Tool-free guard for quick changes 3-position handle allows user to work at any angle Lightweight design with overmold grip provides maximum user comfort Includes one 18V full-capacity 2.6Ah lithium-ion battery, charger, side handle and grinding wheel"