1Powerful Function: Adjustable engine cylinder hone tool is especially designed for deglazing of cylinders with fast and accurate operations, with smooth glaze breaking capacity. 2Applicable Cylinder Diameter: The heavy duty engine cylinder honing tool is professionally used for deglazing engine cylinders with diameter of 3/4in to 21/2in. 3Professional Tool: Engine cylinder honer with powerful arm which can keep the abrasives accurately in line. Spring tension adjusting nut for positive cutting action at all speeds. 4High Performance: Flexible shaft realizes easy use and self centering, and knurled wheel can adjust spring pressure of stones against cylinder bore for higher working efficiency. 5Match to Use: Engine cylinder hone deglazer comes with 3 replaceable 2 inch long 220 grit stones, and you can operate with any standard 11/4 inch to 31/2 inch drill (NOT included).