1. The soft grip can make it so comfortable for the user to fix the machine screws. 2. The users can move on the soft grip and stop wherever they want it. 3. The soft grip will prevent slips, even in an oily working environment. 4. When the users turn on / off the screws, the soft grip can help them to improve the speed and thereby save time. 5. The color ring design can help users to find the using size quickly.