This is a package of six 1/2A hinge points from Robart. These hinges will install by drilling a 1/8" hole and inserting the hinge with a drop of glue. No more hinge slotting! To make sure your hole is drilled in the center of the control surface, use Robart's Hinge Point Drill Jig (ROBR1319). This hinge is suitable for most small aircraft applications and details on scale models like hinging doors.