The DCG412B 20 V Max Lithium-Ion 4-1/2 in or 5 in grinder increases productivity with features like Quick-Change wheel release, convenient trigger switch with lock-off button.Tool-free guard allows for quick and easy guard adjustments/positioningTwo-position side handle offers greater control, comfort and versatilityQuick-Change wheel release allows tool-free wheel removal without the need for a wrenchTwo-finger trigger switch with lock-off button for convenient activation and easier gripping