Built for roughdressing works thanks to its robustness. Closing of clamp by means of key and bolt. Steel axis mounted on first quality leakproof bearings. Body of dur-aluminium with polyamide case. Diameter of clamps 1/1.5/2/2.35/3/3.2/3.5/4/4.5/5/5.5 and 6 mm. Besides does exist clamp nº 0 which covers diameter 0 until 0.9 mm. The hand pieces is being delivered with clamp of 2.35 mm, pressing key and blocking bolt.