This is a genuine Dewalt replacement part, it is sold individually.
The Contact Foot is attached to end of the Contact Trip to prevent the material that it is being used on from getting marred or dented by the trip assembly.

It is a advisable to have one or two extra pads on hand as they do have a tendency to crack and deteriorate over time. And get lost.

This is a genuine Dewalt replacement part, it is sold individually.
The 392243-00 Band is part of the Return system for the driver.
There are two of these bands for each of the tools listed below.
Over time the band will stretch or deteriorate.
It is advised to replace both Bands at this time.

Genuine OEM replacement part, this item is sold individually.
The purpose of this part is to keep air pressure in the cylinder of the tools listed below.
If you have an air leak in your pneumatic tool it is a good practice to replace the O-ring and seals.

This is a genuine Bostitch replacement part, it is sold individually.
The Contact Foot is attached to end of the trip assembly to prevent the material that it is being used on from getting marred or dented by the trip assembly.

It is a advisable to have one or two extra pads on hand as they do have a tendency to crack and deteriorate over time. And get lost.

Genuine OEM replacement part, this item is sold individually.
This part acts as a piston bumper.
After the Air Tool is fired the piston will rise up through the cylinder and strike this part.
As the piston is rising it will also expel the exhaust through this part

This is an authentic Bostitch replacement part used on specific Nailers. This is a Rubber Ring and it is sold individually. O-rings are designed to withstand thousands of pounds of pressure by creating a seal between two or more parts.