只是偶尔用用，买个corded hammer drill 就可以了。

http://www.homedepot.com/p/DEWALT-1-2-in-Single-Speed-Hammer-Drill-DWE5010/204287120?cm_mmc=shopping-_-googlebase-_-D25X-_-204287120&ci_src=14110944&ci_sku=204287120