Features: This mini cutting kit is an ideal addition to your tool bag, specifically designed for situations when a rotary tool is too large and angle grinder too small. The die grinder attachments offers a budget-friendly solution and ensures convenient usage. A maximum speed of 30, 000RPM defines the die grinder spindle, featuring a shank with 2 different threaded heads. Its chuck-type spindle structure can also accommodate various types of wheels for grinding, sanding, cleaning, or polishing, and saw blades. Fits in most grinder, and it's easy to install and uninstall. Specifications: Material: aluminum Oxide Color: black Size: Die grinder cut off wheel: about 2" diameter x 1/16" thick x 3/8" arbor Arbor Hole: about 3/8" and 1/4" inch Package includes: 50 X Die grinder cut off wheel 1 Kit Mounting mandrel Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays. Small parts included, please keep them away from little kids to avoid swallowing risk.