Devices used when connecting truss sections to each other, or to corner blocks or hinge plates. For bolted connections, consists minimally of a 15/16" box/open end combination wrench and a 15/16" deep-well socket and ratchet handle. A drift pin is also desirable, but not required. The Klein Tools 3238 is a socket wrench and a drift pin all in one which can help speed up building truss. https://www.kleinconnection.com/web...238_1-2--Drive-Ratcheting-Construction-Wrench Proto makes a box wrench with one end as a spud wrench. http://www.drillspot.com/products/128694/Proto_2615_Spud_Box_Wrench It's highly suggested that either the ratchet or the box wrench be of the Spud Wrench/Drift Pin variety. For spigoted connections, a dead blow mallet is usually all that is needed to drive the truss pins.