How long can power tools be used continuously?

It is recommended to rest for 3–5 minutes after every 10 minutes of continuous use to allow the motor to cool and extend its lifespan.
 

What should be done if the sandpaper on an electric sander runs out?

You can purchase the KU-001A or KU-001B sandpaper refill packs, or cut your preferred sandpaper to shape and attach it to the sanding head using double-sided tape.
 

What should be noted when using an electric engraving pen or engraving machine?

Avoid applying excessive pressure, maintain a steady speed, and ensure the material is securely fixed during the process.
 

Is the power of USB-powered tools sufficient?

It is more than enough for model work and small-scale projects. If high-torque tasks are required, it is recommended to choose a professional model with higher wattage.