The Gun is a spring loaded device that drives the air pressure into the hole.
The shaft of the inflator expands under pressure to fill the puncture.
The mushroom head of the inflator seats on the inner wall allowing no air to escape.
Tire does not need dismounting from the wheel.
Inflator enters straight in puncture.
Mushroom head seats on inner wall of tire.

Package Included:
1 x Plug Gun
1 x Nozzle 
2 x Probe Tool
1 x Storage Box
1 Bag Mushroom Plugs