Sandflex blocks are a fantastic way to keep your valuable bonsai tools clean and sharp.
The coarse block cleans heavy dirt, rust & sap. The medium is great for light cleaning. The fine restores that "New Tool" look.
Safe for your tools, and easy to use.  Due to the way they wear (which is "hardly") a block should last a lifetime.

S240 Sandflex Block - Fine $ 9.95
S120 Sandflex Block - Medium $ 9.95
S60 Sandflex Block - Coarse $ 9.95