The Victorinox 4.3391.9 medium-grit sharpening stone is the ideal choice for commercial kitchens and restaurant professionals seeking reliable, long-lasting performance. Compatible with the Victorinox 41010 sharpening system, this stone features a medium-grit crysolon silicon carbide surface, delivering consistent abrasion throughout its service life. Perfect for restoring sharpness after reshaping, this stone ensures knives maintain their precision, reducing the need for frequent replacements. Its gray industrial finish and durable construction make it a staple in any professional kitchen, providing the consistency and reliability chefs demand.