The main reason why manual tools should not be placed on the edge of the workbench is that the tools are prone to falling and injuring people.
In addition, the safety regulations for the use of manual tools also include the following points:
The tool user must be familiar with the performance, characteristics, usage methods, archiving and maintenance methods of the tool.
All construction tools must be qualified products produced by formal manufacturers.
Tools must be inspected before work, and the use of unqualified tools such as corrosion, deformation, looseness, malfunction, and damage is strictly prohibited.
When stopping work, it is prohibited to place parts or tools on the machine or equipment.
Tootpicks, tools with sharp blades, and rotating parts must have protective devices.
When using special tools such as blowtorches, punching machines, etc., appropriate safety measures should be taken. Small appliances should be stored in a toolbox for safekeeping.

