Tweezers

The tweezers are used to remove the heat shrink tubing and mandrel from joined tubes.
Razor

The razor is used to make a clean cut on the end of the tubes.
Heat Source

The heat source is used to shrink the heat shrink tubing while melting and joining
the tubes together. A heat gun or hot air station is typically used for this purpose.
Scissors

The scissors are used to pre-cut the edge or end of the heat shrink tubing to provide
the starting point where the heat shrink tubing will be removed.