Last I knew, the 3.3 mya evidence from the site Lomekwi 3 in Kenya was debatable, though a serious possibility, and the 2.58 mya evidence from the Olduvai Gorge in Tanzania was considered the sure thing.

Also, more than primates use tools: Many corvids (crows, ravens, etc.) do, as do other animals. Look up New Caledonian Crows in particular.

But don't take all this from HN commenters debating each other; find some authoritative sources. A recent review article in a scientific journal would be a great start. Google Scholar lets you search for review articles.