Each order also includes the necessary screws for each t-nut.
Round base t-nuts are used in most commercial climbing gyms because of their security and the minimal effort required to install. If making sure you never accidentally push a t-nut out when you are route-setting is important to you, then you want the Round Base version. You can insert them by hand into the pre-drilled holes in your climbing wall. There are 3 holes in each t-nut which allow you to fasten a couple screws into the wood from behind the wall. These screws will keep the t-nut from spinning and from popping out when you try to fasten a hold to the wall. 3 zinc plated screws are included with each t-nut ordered.