What must be avoided when using impact tools?

When using impact tools, mushrooming must be avoided because it refers to the deformation of the tool's striking end, typically a hammer or chisel, that results from excessive impact. This deformation creates a mushroom shape, making the tool less effective and potentially dangerous. A mushroomed striking surface can increase the risk of tool failure, leading to fragments becoming dislodged during use, which could injure the operator or bystanders. Maintaining the integrity of the tool's striking surface is essential for safe and efficient operation, as a properly formed striking surface allows for better transfer of energy during impacts. Proper maintenance and regular inspection of tools can prevent mushrooming and ensure safer working conditions when utilizing impact tools.