Hone in on performance. The OEMTOOLS 25041 Adjustable Engine Cylinder Hone Deglazer efficiently removes the carbon, rust, and heat glaze deposits on cylinder bores that can cause low cylinder pressure and affect engine start up. This cylinder bore honing tool features powerful steel arm design that keeps the abrasive stones aligned correctly. The rigid hone arms have an adjustable 2 inch to 7 inch range (51 millimeter to 128 millimeter) compatible with many vehicles. The spring tension adjusting nut delivers positive cutting action at all speeds and smooth glaze-breaking performance. Plus, it fits right in with the equipment you already have in your shop or garage. This easy to operate cylinder hone set is compatible with any standard 1/4 inch to 1/2 inch drill and is ready to use right out of the package, with replaceable 4 inch medium grit stones included. Simply attach the power hone to your drill, lubricate with any engine honing oil and run at low speeds moving up and down the cylinder walls. Whether you're an experienced technician or a home mechanic honing your skills, you can rely on the OEMTOOLS 25041 Adjustable Engine Cylinder Hone Deglazer for the clean, quick performance you need.