Each of these sets comes with four differently shaped stones.

Remove surface scale left by the EDM (electrical discharge machining) process.

The abrasive is specially treated for use on aluminum, brass, bronze, and other soft metal molds and dies.

Quickly sharpen straight-blade tools.

The reservoir in the base keeps the stone clean and oiled.

A different grit on each side enables multistep sharpening with one stone.

The backing cushions the abrasive to prevent gouging your work surface.

The abrasive in these blocks wears evenly to maintain a flat surface. They can be used to remove burrs from metal die fixtures and machine parts or to clean magnetic chucks.

Access tight spots. These sticks are spring-loaded to hold a small sanding belt taut, but you can easily rotate the belt when it becomes worn.