Known in Japan as Mataeda Hasami, these razor sharp tools are designed for cutting branches flush to the trunk. The resulting wound can then heal over quickly with little scarring. The Concave Cutter is the single most important tool for Bonsai use and for which there is no substitute. The 8" versions are considered the basic size to begin with. The solid stainless steel construction of our Master grade Concave Cutters gives the feel of fine surgical instruments and will provide a lifetime of superior use and easy care. The durability of these tools are second to none. Professional: 15/16" blades, 8" overall length