( PACK OF 2) 43-34-3000 Blade Backing Flange is designed to fit specific grinder models including 2880-20, 2882-20, 2968-20, and 3670-20. It provides a secure base for grinding or cutting discs on these tools. Flanges and nuts hold abrasive discs and cutting wheels onto the spindle of an angle grinder. They properly seat and secure the discs and wheels to prevent them from wobbling or flying off during use. They are used to replace missing, worn, or broken flanges and nuts.