6th edition. Our fundamental research into the knife edge that changed the mindset of the international sharpening community. Our knife sharpening computer software and gadgets are used in 64 countries, as of today.

Learn how to make both minor and major DIY repairs and improvements that will save you money! No need to hire a plumber, especially in emergencies when you need an immediate fix. This best-selling guide, Ultimate Guide Plumbing, 6th Edition will teach you everything you need to know, from toilet installation and repairs to running underground sprinkler systems for your garden and yard irrigation. This new edition also includes new information on leak detection, mixed water temperature control, alkaline water treatment and scale reduction devices, domestic water heaters, drinking water treatment units and is updated with 2024 National Plumbing Code Standards.

The ideal guide for knifemakers, collectors, culinary professionals, and more, this book teaches multiple methods for making your blades as sharp as new—or even sharper. Starting with the theoretical foundations and mechanics of sharpening a blade, the authors then provide step-by-step instructions for honing various types of knives with V-sharpeners, guided systems, rapid sharpeners, diamond files, sharpening steels, traditional stones, wet grinding, and belt sanders. Each process is illustrated with pictures and offers practical instruction, including methods suited for challenging blades like serrated blades and knives with wavy or convex cuts. Finally, there is a section on the proper ways to test the sharpness of a blade. Suitable for all skill levels, and complete with detailed diagrams, this is the sharpening guide for all knife owners and users.