NuoDunco 2 pack Cut Off Wheel Mounting Mandrel, 6.35mm Shaft Fits Die Grinder and High Speed Drill, 30000RPM

Great idea, designed to mount a Cutoff Wheel or Grinding Wheel for use on a rotary tool such as a die grinder or drill. Two adaptable bores for 3/8Inch (9.5mm) and 1/4Inch (6.35mm) arbor hole for most 3 inch cut off wheel mounting. The high standard 1/4" shank fits most Die Grinder rotary tools well and supports up to 20,000 RPM. Made of A3 carbon steel with black-plated surface, it is lightweight and durable, resistant to high temperature, corrosion and rust. NuoDunco: industrial grade abrasives supplier, not only offering a mounting stem but also offering 2″ 3″ Cutoff Wheel and Grinding Wheel, and in the future will be supplying 2″ 3″ custom Flap Disc and Wool Felt Wheels, if you often have small area detail work keep an eye out I'm pretty sure these little guys won't let you down.