Trowel

I apparently do not know yet the importance of a trowel but since there were very specific instructions on what brand and kind of trowel to buy, details the rest of the items on the "need list" lack, I assume they are very important. So I bought it today and i even did it ONLINE. Jaw drop I know... Here it is and it even came with a holster.. FANCY. Below are the very specific instructions.

Trowel (preferably Marshalltown (size 4/5) or WHS brands). Since these are not available in Israel, try to purchase one for your own use to bring to the excavation. This can be purchased online as well, see: http://www.marshalltown.com/catalog/display_item.asp?edino=11121