Magna-Matic Spanner Wrench Made in the USA For stones 25 microns/500 grit

For stones 25 microns/500 grit to 4 microns/3000grit Use Medium Surfacing Compound

Resin Bond grit chain grinding wheels are for chain pitches of 1/4"

this stone has plenty of surface to handle almost any tool

it even comes with a leather pouch for storage

Magna-Matic Spanner Wrench Made in the USA For stones 25 microns/500 gritSpanner Wrench for Magna Matic Mower Blade Grinders When changing grinding wheels, the Spanner Wrench is used to turn the arbor nut, while the 9000 53 Arbor Wrench fits into the notches of the back of the arbor to prevent it from turning. The 9000 21 Spanner Wrench is the same as the one included with the Magna Matic grinders.