The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. hero-video Merchant Video Will Tumbler work for my knives? The Tumbler Rolling Sharpener sharpens most kitchen and outdoor knives, including stainless steel, carbon steel, and Japanese blades. It’s not for serrated knives or scissors. Perfect for those who value versatility, ease of use, and sharp results! Which angle should I use: 15° or 20°? The 20° angle gives a durable edge for kitchen tasks and outdoor use, sharpening quickly for tough jobs. The 15° angle offers precision, creating a finer edge ideal for Damascus or high-quality carbon steel knives, perfect for detailed, delicate cuts What makes Tumbler different from other sharpeners? Tumbler delivers precision, ease, and pro results. Unlike honing rods, it truly sharpens. Pull-through sharpeners cause wear; Tumbler maintains angle. Unlike whetstones, it’s accurate with a rolling action. Enjoy effortless sharpness.