Tool and tool attachment

An insulator comprising:

• an insulator body;
• a barrier support formation connected to the insulator body;
• and
• a mounting formation connected to the insulator body and having a front side and a back side, the mounting formation defining a plurality of staple leg passages extending transversely through the mounting formation from the front side to the back side, the plurality of staple leg passages positioned such that two legs of a staple can be driven through any two adjacent staple leg passages of the plurality of staple leg passages.

An insulator comprising:

• an insulator body;
• a barrier support formation connected to the insulator body;
• and
• a mounting formation connected to the insulator body and having a front side and a back side configured to engage a fence post, the mounting formation defining a plurality of staple leg passages extending transversely through the mounting formation from the front side to the back side, the plurality of staple leg passages positioned such that two legs of a staple can be driven through any two adjacent staple leg passages of the plurality of staple leg passages, and the mounting formation including an alignment member engageable by a first alignment member of a staple driving tool to align the staple driving tool such that the staple driving tool can drive the legs of the staple through the two adjacent staple leg passages, wherein the alignment member includes a substantially circular passage in the mounting formation.