270mm/10.6 inch adapter plate attaches to Husq PG820 floor grinder Allows Husky floor grinder to hold 3 pcs trapezoid grinding disc and 3 pcs redi lock metal bond tooling. 11mm thick stainless aluminum plate diamond conversion plate Fit with m6 threaded and 9mm non threaded trapezoid grinding disc 11 inch adapter plate with 3 trapezoid disc seats for Husky grinder