Extension for drive spindles with a working length of approx.
• 75 mm, a tool mounting of 1/4" and a shank holder of 3/8". Drive spindle extensions are a cost-effective alternative to special made-to-order burs and mounted points with long shanks. Drive spindle extensions allow shanks of grinding and milling tools to be extended." Recommended extension for drives with a maximum rotational speed of 20,000 RPM.