These are a great addtion to any waterstone or sharpening stone, they hold the stone securely and stop the stone slipping around as you sharpen. The
Waterstone Non-slip Holder
DMT Diafold Sharpener for Knives, Single-Sided Diamond Whetstone, Folding, Fine, Red
Diamond Machining Technology (DMT) MAGKIT-4 Diafold Whetstone Sharpening Kit With 2-Sided Diamond Sharpening Stones
Diafold® Singled-Sided Sharpener - Portable Sharpeners - Sharpeners
Tool Care – Ben & Lois Orford
DMT Diafold Coarse Flat Diamond File
Diafold® Double-Sided Sharpener - Portable Sharpeners - Sharpeners
DMT Diafold Double Sided Sharpener Fine/Coarse - Classic Hand Tools Limited
DMT DiaFold File Sharpener Fine – Ben & Lois Orford
Diafold Serrated Knife Sharpener: Features 4 cone tapers ranging from 1/4 to 1/16 in diameter; designed for sharpening serrations of all sizes and
Diamond Machining Technology (DMT) Diafold Serrated Diamond Knife Sharpener, Fine (FSKF)
Diamond Machining Technology (DMT) Diafold Serrated Diamond Knife Sharpener, Extra Fine (FSKE) : Home & Kitchen