Yes, the wood post insulator is suitable to build the simple electric fence, it is very easy to screw the wood post insulator into the wood post, and then load the polywire, wire onto the wood post insulator,  building the ground system and connect to the energizer, a simple electric fence is ready for use.

For the wood post insulator, there are 2 type, Type A and Type C
Type A wood post insulator is with the straight support core inside. this is economy type, the net weight is around 18g.
Type C wood post insulator is with the continuous support core inside. this is more durable, the net weight is around 25g.

Type A Wood Post Insulator:

Type C Wood Post Insulator: