Fits Dremel brand 100 series, 200 series and model 395. New version at http://www.thingiverse.com/thing:857119 Need to hold your Dremel tool in a vise. This holder does. Slides over the 47mm round, 32mm long section. Set into your bench vise and snug it up. Now you have a bench mounted cutoff tool. I could not live without it. Now I don't have to. Holder is 28mm long. Made a version for Dremel Model 4000 and 4200. http://www.thingiverse.com/thing:908833 4000 series bodies are not round. Profile has required much tweeking and still needs more. Profiles of 4000 and 4200 are different. Thank you for liking my work, MitchPrinted in 1 hour on a PrintRBot Plus. 0.4mm nozzel. Transparent PLA. 20% fill. 2 perimeters. 1st layer at 30mm/s, all ther rest at 60mm/s. Top and bottom layers are just fill, not solid. The perimeters make the wall of the holder.