Shopsmith  4-1/2 in. Dia. x 7/8 in.  Zirco
*Diameter: 4-1/2 in.
*Arbor Size: 7/8 in.
*Material: Ceramic
*Product Type: Flap Disc
*Grit: 60 Grit
*Grade: Coarse
*Number in Package: 1 pk
*Grit Type: Extreem Removal
*Usage: 4-1/2" Angle Grinders