You are Buying a brand New And Factory Sealed  Avanti Pro 4-1/2 in. x 1/16 in. x 7/8 in. Thin Kerf Metal Cut-Off Disc (15-Pack) Model #PBD045063115F.....    Aluminum oxide formulation for fast material removal and extended cutting life
For use on metal applications
4-1/2 in. Dia
Arbor: 7/8 in.
Type 1: flat
Tool: angle grinders