All models benefit from the extra durability provided by pinning during assembly. The Formula P3 Modeling Drill and Pinning Set provides the control and comfort necessary to make pinning your models easy. This set includes a drill (also known as a pin vice) with two .85mm bits and twelve .85mm brass rods (pins) suitable for pinning Warjacks, Warbeasts, and Trooper models Additional sizes are also available look for Formula P3 Pinning Expansions.