Ohio Power Tool makes available an assortment of impact sockets.  We carry all sizes from 3/8" to 2-1/2" drive sockets, and we have standard as well as deep sockets, also available in metric.  We also have extensions and adaptors and other attachments such as a #5 spline drive impact extension.  Make sure to also take a look at the kits we have, made available to you by renowned brands like Ingersoll-Rand and Wright Tool.