在 Amazon 见到 这个,$44.99, 是个好deal 吗?平时一般用来做什么(不仅仅是装锁吧)?
DEWALT D180002 Standard Electricians Bi-Metal Hole Saw Kit (9 pieces)
https://www.amazon.com/DEWALT-D180002-Standard-Electricians-Bi-Metal/dp/B00005LF01
https://www.amazon.com/DEWALT-D180002-Standard-Electricians-Bi-Metal/dp/B00005LF01