English size is 3/8 across flutes. 1/2 is diameter of steel.
Pro-PM turning tools are the "elite" of all turning chisels.
Made from an advanced Particle Metal, the molten steel has been compressed and sintered giving our Pro-PM turning tools a cutting edge which lasts up to four/five times that of a conventional High Speed Steel tool.
The chisels are hardened to between 66 and 68 Rockwell, enabling the tools to have a vastly superior wear resistance, excellent grindability, superior toughness, a high working hardness and a high retention of hardness.
The ergonomically designed beech handles fitted to these tools make the finished chisels unbeatable.