PGSS sign for HINGE

HINGE
Hold 1st 1st finger hand, back forward and 1st finger pointing inward, and put 2nd 1st finger hand, back forward and 1st finger pointing inward, with side of its 1st finger on side of 1st finger of 1st hand; then keeping lower knuckle of 2nd finger of 2nd hand on tip of 1st finger of 1st hand by wrist action turn 2nd hand till back outward and 1st finger pointing forward.
[Compare BLADE, PENKNIFE]