With extensions for drive spindles, the shafts of grinding and milling tools are lengthened. They enable use in hard-to-reach areas and particularly deep holes. They are clamped into the collet of the machine with pneumatic or electric drive or into the handpiece of the bending shaft and must additionally be guided by hand. Extension for drive spindles for manual use with a diameter of 13 mm, a length of 300 mm, a tool holder of 6 mm, and a shaft holder of 6 mm. Includes 2 clamping wrenches DM SW 6/7 mm and 1 collet 6 mm. Max. RPM 25,000 including 6 mm collet.