Hi Tim ,
Yes it is a reciprocating type blade used in demolition work , it is meant to be able to cut wood and metal (nails)
Not exactly sure why I bought that , but it kind of looked the part to me.
Needless to say , I know nothing about cutting wood apart from my usual "well that looks about right" kind of attitude...
The idea was more about coming up with something light and compact , easy and fast to assemble , as for the blade someone that actually does have a clue could suggest something better...