1,Professional Taiwan motor and durable metal gear?????????????????????????????????????????????????????? 2,HuangYu battery is the third biggest battery supplier,the first is Sanyo,the second is Panasonic??????????????????????????? 3, Japanese PC material housing, not recycle material?????????????????????????????????????????? 4,Sanou or Weida chuck from the same supplier as MAKITA and BOSCH 18V two speed with Hammer cordless drill.