You don't see the 'no magnet' version much, but it's not obsolete. This site calls it the 'standard' version. They're doing a 20% off sale btw. http://www.spacecasegrinders.com/standard/ I would avoid using that on the screen in the future. I never use anything on the screen but a brush, including a toothbrush when cleaning. Never damaged a screen even on a cheap grinder.