6mm (1/4″) individual chisel, overall length 245mm (9 5/8″).Ulmia is the premier German manufacturer of traditional hand tools for woodworking. The utmost level of quality of materials, fit and finish is hard to describe but plainly evident upon viewing these chisels. These are professional-quality tools which are built to last for more than a lifetime. Blades are made from high-grade chrome vanadium steel. Handles are from select white beech. Hoop and ferrule are made from steel.