The sharpening stone from KATTO arrived quickly and was securely and carefully packaged. The product itself is exceptional—high-quality and performs beautifully. It came with easy-to-follow instructions, and in just 20 minutes, our KATTO knife was as good as new. The follow-up emails and thorough aftercare service were a great touch. Not only is the sharpening stone incredibly practical, but it also looks fantastic. Highly recommended!