Nickel bond grinding discs for Covington's Perfect Maxi Laps are now available in a variety of grits! Each disc has a magnetic backing for quick change capabilities on the perfect maxi lap's steel topped aluminum head. These discs are available from our coarse 60g (for aggressive removal of material) through 1200g (our finest option in nickel discs). If you are looking for a smoother finish, see Covington's Resin Diamond Discs for grits finer than 1200g.