Experience a Two-Stage Sharpen in a Compact Package - Kai AP0538 Double Sharpener.The Kai Compact Double Knife Sharpener AP0538 delivers a two-stage sharpening system - coarse Alundum for edge restoration, alumina ceramic for finishing - in a compact body that fits easily in a kitchen drawer. Built for regular maintenance of double-edged kitchen knives.The Specs Model: AP0538 Stage 1: Alundum #400 (coarse) Stage 2: Alumina-based ceramic (finishing) Body: Styrol resin (70°C heat resistant) Size: 112 x 62 x 75mm, 138g Origin: Made in Japan by Kai Corporation Two Stages, One Compact ToolThe two-stage system progresses from coarse to fine - restoring a dull edge with the Alundum stone, then refining it with the ceramic finish. The compact size makes it easy to store and reach for regularly, which is the key to keeping kitchen knives in good working condition. A practical, no-fuss sharpener for everyday use.Care and Maintenance Clean under running water after use Allow to dry fully before storing Not suitable for single-bevel Japanese knives Replace when abrasive surfaces show significant wear