You are Buying a Brand New And Factory Sealed DIABLO 4-1/2 in. x 1/16 in. x 7/8 in. Metal Cut-Off Disc with Type 27 Depressed Center (10-Pack) Model # DBD045063710F.... metal cut-off discs provide superior performance and increased productivity. Featuring a premium aluminum oxide blend, these discs cut through material faster than other cut-off discs and offer an extra-long cutting life. Fully reinforced for use in hand-held cut-off work. Ideal for use when working in hard to reach areas.