WALTER Surface Technologies - 150 Grit, 4-1/2" Disc Diam, 5/8-11 Center Hole, Type 27 Aluminum Oxide Flap Disc - 13,300 Max RPM, Plastic Backing, Arbor Attaching System, Coated & Non-Woven Combo

Coated and non-woven combinations are designed for grinding and polishing in a single step.

Type 27 flap discs are less aggressive and are used primarily on flat surfaces for grinding a smoother finish.

Aluminum oxide is the most commonly used abrasive. Best-suited for general purpose deburring and blending, it is tough, economical and fracture resistant. Commonly used on ferrous alloys, high tensile materials and wood.

Arbors require adapting nuts. They eliminates cross threading.