Extra Thickness: 300mm Extra Depth: 120mm Accessories: Cap (1 set of spare included in addition to the main unit); For fixing materials such as jointing, welding, machining, and woodworking. Forged bars resist warping and bending The long neck finish allows you to tighten it up to a depth (4.7 inches (120 mm) than the normal (3.1 inches (80 mm). BAKUMA INDUSTRIAL CO., LTD is a Japanese company that manufactures and sells residential products, carpentry tools and tools. The company opens up a variety of unique fields depending on technology and ideas. The foundation began with a field of carpentry and has been further advanced, and trusted by many customers. Specifically, residential products are subject to high safety and quality, so we have the most of our in-house products and operating machines, and thoroughly advanced technology and strict product management. We pursue the quality of trust, use the ideas and technologies of each employee, with a superior service system to meet your requirements. Carpentry tools and tools: Bars, woodworking saws, saw (replacement blade), clamps, diamond cutters, precision woodworking cutters, etc. [Agricultural cutting blade] grass cutter saw, blade cutting blade, etc. [Household necessities] Energy saving ducts etc.