Double-Reinforced Cutting Wheel – We’ve double-reinforced our abrasive cut-off wheels with fiberglass to provide added durability and longevity Made in USA Cut-Off Wheels – You can trust the materials and the manufacturing process used for our abrasive cutting wheels, as they are made in the United States Includes Mandrel with 3/8” Shoulder Screw – Designed to fit 1/32” to ¼” thick cut-off wheels, it’s perfect for cutting carbon steel, cast iron and general-purpose metal Made for Aggressive High-Speed Cutting – Our wheel can spin at a maximum speed up to 25,000 revolutions per minute. For safety, be sure to use with a guard 6-Pack of Wheels – This kit has six wheels, so you’ll always have plenty of cut-off wheels on hand to finish the job and to start the next one!