Review on DMT FFF Diafold Diamond Foldable Sharpening Tool by David Hill

The diamond file itself is excellent as expected from DMT. But the folding plastic handle is cheap and flimsy; not the quality expected from DMT. However, you can improve grip by adding 5.5" 1" heat shrink tubing (no shrinking). This prevents the handle from swinging back and forth during sharpening and provides a better grip. Not all nominally 1 inch heat shrink tubing is the same size. Try different pieces or brands of tubing until you find one that fits the handle snugly. Four stars with this modification; three stars without.