A pneumatic inflation system for use with a freight carrier, such as a tractor-trailer, is provided. A switch including a translator and a filtering database for performing a single search is presented. A retainer is mounted around the end of the drive member and has two resilient portions extending into the hole of the drive member via the slots for rotatably holding the drive member in the hole of the head and for securely, releasably holding the fastener-driving member in the hole of the drive member.