Brush Research

GB312320SC

3 1/2 (89mm) Flex-Hone Cylinder Hone Tool 320 Grit (Silicon Carbide)

Engine Tools

Flexible Cylinder Hone made of Silicon Carbide
Hone is Made in USA by Brush Research Manufacturing
Hone is self centering and can be used with 3/8" or 1/2" chuck drill
Perfect for bore honing and cylinder refinishing
The hone size listed on the product is the bore it is intended to be used for (or slightly smaller bore will work)

Working range 3.050"-3.550" (75mm-90mm). Hone is 14" long. Great for steel cylinders.

Permatex 80037 Valve Grinding Compound, 3 oz.