With a housing head made of aluminum die-cast and a 100 mm long, slim spindle neck (Ø 20 mm). Designed for working in areas that are almost unreachable for conventional rotary tools: milling, grinding, polishing, drilling, deburring, and finishing (especially suitable for internal grinding). A high-speed tool with a balanced special motor. Infinitely variable electronic speed control (full-wave electronics). Ball-bearing precision shaft made of ground steel. Six 3-slot MICROMOT system collets (1.0 - 1.5 - 2.0 - 2.4 - 3.0 and 3.2 mm) ensure high run-out accuracy. No rattling or chattering of the tool attachments. The spindle locking mechanism facilitates tool changes. The 20 mm spindle neck (MICROMOT system fitting) also makes it suitable for use with drill and horizontal stands.