10500Brake Cylinder Hone 2-stone hone fits cylinders 11-/1 6" to 2-1/2" (I 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. Shipping wt. 3 oz.