3-Leg Engine Cylinder Hone Suitable to use with standard 1/4" or any electric drill. Use appropriate fluid for cutting lubricant. Interchangeable honing Supplied complete with 4" (100mm) long 180 grit stones Capacity : 2" to 7" (51 -177mm) in diameter Overall Length : 12" (300mm) Application : Automotive brake and clutch cylinders, engine cylinders of motorcycles, lawn mowers, outboard motors, hydraulic cylinders, machine and industrial engines and etc. Capacity : ∅2" - ∅7" Length : 300mm