Stop & Go 2075 Replacement 25 Pack Of Mushroom Tire Plugs 3/4" Length x 5/16" Shaft Diameter

There are two important steps that people miss when using Stop & Go's mushroom tire plugs. The first is using some sort of lubricant inside the funnel looking guide tube. The mushroom plugs come lubricated, but if they dry out, make sure you relube them so they push through the guide tube easier.

The second really important step is to push the mushroom plug into the tool so it's inverted. Almost like loading an old musket. You'll use the guide tube, and push the mushroom plug into the tool. If you forget this step, it's almost impossible to get the mushroom plug to go through the guide tube.