Robart Mfg. 1/8" Steel Pin Hinge Points (15 pack) (ROB308) Package of 15 Steel Pin Hinge Points from Robart. The hinge will install by drilling a 1/8" hole and inserting the hinge with a drop of glue. To make sure your hole is drilled on center and straight use Robart's inexpensive Hinge Point Drill Jig sold here.