What can occur when using a file without a handle?

Using a file without a handle can indeed lead to injury to your hand. When handling a file directly with bare hands, there’s a high risk of slipping, which can cause cuts or abrasions due to the sharp teeth of the file. The handle is designed to provide a safe, comfortable grip, allowing for better control while filing. Without it, users may exert excessive force unknowingly or lose their grip, increasing the chances of accidents.

The other options relate to improved performance or safety, which do not apply in this situation. Using a file without a handle does not increase precision or grip and will not enhance the speed of the filing process; rather, it diminishes safety and effectiveness.