Premium Zirconium Mini Discs - small diameter Flap Discs for ferrous materials. Ideal disc for material removal and blending and work area needs to kept to a minimum. Mini Disc Offers: Improves access to small awkward areas. Minimised area of repair/work to reduce time. Exeptional life compared to traditional coated abrasive discs of the same diameter. Quickchange locking system for convenient, quick change over of discs.