Hand tools

For DIY, tools such as screwdrivers (Torx or flat, or electrician screwdrivers) or wrenches (Allen wrench or adjustable wrench) will help you with ease. Also choose good pliers to unscrew bolts, strip wires, or loosen a faucet.
There are universal pliers for stripping wires and loosening, as well as multifunction pliers or those with smooth jaws. Some are more suited for industrial use and may be part of the tools related to refrigeration (air conditioning, CTA, heat pump, etc.).
The six-point torx wrenches are also very useful during an afternoon of DIY, for tightening objects or maintaining a device.