1-1/8" x 3/4", A5 Mounted Shank Point, Made From Durable, High Grade, 60 Grit, Aluminum Oxide, Perfect For Grinding, Polishing Or De-Burring Ferrous Metals Or Other Hard Surfaces, For Use With 1/4" Chuck High Speed Drills, Especially Useful Where Larger Wheels Will Not Fit Or Where Small Abrasive Wheels Wear Out Too Quickly, Carded.