Features of the 20V MAX lithium-ion 4-1/2" cut-off tool include: 6500 RPM (revolutions per minute) motor provides high power for cutting and grinding applications. Quick-Change wheel release allows for tool-free wheel changes without the need for a wrench. Tool-free guard allows for quick, easy guard adjustments/positioning. 2-finger trigger switch with lock-off button for convenient activation and easier gripping. 2-position side handle offers greater control, comfort, and versatility. Spindle thread: 5/8". Tool only (battery and charger sold separately).