Cylinder Hone, Manufacturer suggested retail price. $15.75 Features and Benefits: 2-stone hone fits cylinders 11/16" to 2-1/2" (7.4 - 63.5mm) Controlled pressure makes it possible to polish or hone with just one stone grit Square ends of stones hone to the end in step-cut and blind-end cylinders 240 grit stones are 1-1/8" long Flexible driver Skin-packed Manufacturer: Lisle Lifetime warranty does not cover abuse