3″ (76mm) Heavy Duty Commercial version Engine Cylinder Hone for all engine applications utilizing a 2.500″ to 3.055″” or 62mm to 78mm bore. 240 GRIT This cylinder Flex Hone is a Commercial version with 50% more Globules and has a 13 1/2″ long shaft. – Brand new sealed in package engine cylinder flex-hone. – Designed to work with cylinder bores from 2.50″ to 3.055″. – Perfect for for all engine types and block materials. – Made in USA by the best cylinder hone manufacturer, FLEX-HONE. – 240 grit, EXCELLENT for re-ringing jobs or final bore. – Tool is labeled as a 3.00″ diameter but is actually slightly larger to provide the required wall force for honing a 3″ bore – Tool is self centering and is easy to use (email us for instructions) – Tool can be used with a 3/8″ or 1/2″ chuck portable drill or drill press This patented Flex-Hone is the best way to create a Cross Hatch surface finish with suspended globule working abrasives. Contact us for more information as we use this hone on all of our race motors. Most of the engine hone articles reference this exact brand and type of tool. THIS TOOL HAS THE 13 1/2″ LONG SHAFT for engine rebuilding. ITEM IS BRAND NEW NEVER REMOVED FROM FACTORY PACKING, Inquire about other sizes/grits.. Buyer to pay shipping calculated on shipping tab, will combine orders, will ship international SEE OUR OTHER LISTINGS FOR all hone sizes and grits, honing oil, and cylinder wash brushes