可以考虑买以下东东

http://www.harborfreight.com/13-pc-12-in-drive-metric-impact-socket-set-61702.html

http://www.harborfreight.com/3-pc-impact-socket-adapter-set-61991.html

http://www.harborfreight.com/4-Pc-12-in-Drive-Impact-Socket-Extension-Set-67972.html

http://www.harborfreight.com/hand-tools/sockets-ratchets/12-in-drive-25-in-breaker-bar-60819.html

这个可伸缩的我用的最多，方便

http://www.harborfreight.com/12-in-drive-extendable-ratchet-62311.html