This adjustable sharpening stone holder system has an elegant design. The high friction Elastomer rubber holds the stone in place and will grip most kitchen surfaces. It includes 2 rubber blocks for height or angle adjustment and a plastic tray for catching excess water. It accepts sharpening stones with or without bases, from 5.9" to 9.8" (150mm to 250mm) long. Accepts sharpening stones with or without bases, from 5.9" to 9.8" (150mm to 250mm) long. High friction Elastomer rubber holds the stone in place Includes 2 rubber blocks for height or angle adjustment and a plastic tray for catching excess water.