Sears offers the Craftsman 8-Piece Impact Drive Tool Accessory Set for $44.99. Opt for in-store pickup to dodge the $4.49 shipping charge. That's $5 under our September mention, $25 off list, and the lowest price we could find. It features five extension bars for 1/2" and 3/8" drives, 3/8" and 1/2" universal joints, and a 1/2" to 3/8" adapter.