The biggest hazards from using hand tools are a result of improper use or maintenance. Some examples can include the following:
Using a chisel as a screwdriver can cause the tip to break and fly off, which can hit you or someone else.
If a wooden handle on a tool is loose, splintered, or cracked, the head can fly off and strike you or someone else.
If the jaws of a wrench are sprung, it might slip.
If impact tools (such as chisels, wedges, or drift pins) have mushroomed heads, they might shatter on impact (which can send sharp fragments toward you or anyone else).
You’re responsible for the safe operation of your tools and equipment, so you should never use them if they’re not safe.