This is the Expansion Chamber and Drill - the heart of the system. Usually you'll only buy this if you have lost your drill but still have the rest of the parts to your kit, or if you are trying to assemble the kit yourself, but don't want to do the tricky modifications on these parts.

Note that this is only a Drill and Expansion Chamber with 1' of extra air hose. Drill bit and all other items not included.

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