For the safety of your and your family's property and life, please carefully read the following items Please select the appropriate length of wire. (Please do not pull the power cord. If removed, please insert the plug into the tail handle.) Do not use it in bundles as it may catch fire due to heat

Double insulated wire has two protective layers between conductors and the outside — learn what that means, how it’s built, and why manufacturers specify it.

Single insulated wire uses one protective layer; double insulated wire adds a second layer of protection.