1/4" 6.4 mm Flexhone Flex-hone Ball hone 320 grit (0.250") Aluminum Oxide

6.4 mm or 1/4" (.250) Aluminum Oxide Cylinder Head Flex-Hone

 for all engine valve guide applications utilizing a 0.215" to .260"  or  5.1mm to 6.7mm bore.

Aluminum Oxide 320 grit

This brand new sealed in package SPECIALIZED APPLICATION (Nikasil plated/coated) engine cylinder head valve guide Aluminum Oxide flex-hone.

This is NOT a brush but a hone with abrasive globules that will produce a controlled finish.

 The hone is designed to work with bores from 0.215" to 0.260".

Perfect for for materials types, steel, bronze, etc.

 The hone is made by the one of the best cylinder hone manufacturers, FLEX-HONE.

The hone is 320 grit, EXCELLENT for guide honing.  

This patented Flex-Hone is the best way to create a Cross Hatch surface finish with suspended globule working abrasives. 

This Aluminum Oxide version Hone is perfect for Nikasil plated or coated applications'

For Silicon Carbide (less expensive hones see our ebay store)

THIS TOOL HAS THE extra long SHAFT for cylinder head  rebuilding.