Finally a heavy chuck of modest dimensions with a high run-out-precision for professional use. The entire casing and all parts are of steel. The chuck takes drills with a shaft of 0.5 to 13 mm. It is made in Germany by the company Röhm, which is known for the high quality products they produce. These drilling are distinguished by their high precision (run-out precision 0.1 mm). They are hardened, balanced, the ball bearings run very smoothly and the body is only 40 mm in diameter. No key is needed to operate them. They come with a B12 morse taper 1, 2 or 3 shaft.