I use this dispenser for years and am become aware only after reading the reviews that he really slip something in losing weight eineses piece tape. But: This has never identified me something. Is nevertheless handed with the left hand and the teeth are sharp enough. But use only original tesa rollers. The whole is perhaps Übungssache-. A really stable tape dispenser you get well only when the anschraubt. Where I write this, I'll maybe do once: bolting to my favorite spot. Because the fully laden desk you can then probably no longer slip ...