Standard Abrasives (3M) Buff & Blend Cross Buff Kit Used for surface preparation prior to coating. May be used for the removal of surface oxidation, rust and corrosion. Great for polishing the inside diameters of lifter bores, valve bodies and brake cylinders. Polishing round and square tubing, valve spools, molds and dies. This product withstands heavy edgework while blending and polishing. It resists loading and is cool running . Durable construction withstands heavy edge work while blending and polishing; long life. -Extended Duration & Rate of Cut -Cool Running -Satin finishes on soft metals -Eliminates changing critical tolerances -Quick Change Kit Contains: (2) 1" 2-PLY A/O Medium HP 8,000Max RPM (2) 1" 2-PLY A/O Very Fine HP 8,000 Max RPM (2) 1-1/2" 3-PLY A/O Medium HP 8,000 Max RPM (2) 1-1/2" 3-PLY A/O Very Fine HP 8,000 Max RPM (1) Combination 4" x 1/4" Mandrel (1) Set Screw