This is a Left side of a left and right pair of new , revised clamps for improvised DIY COVID19 face sheild. Use #6-32 m/c screws with nuts x 1/2”, and #6 shorter m/c screw directly into visor attachment wedge. Alternatively, holes will accommodate #10 self-tap wood screws directly into plastic. Full instructions and pics are in this Google Doc: https://docs.google.com/presentation/d/1rE98nxYEAYZi3LJez938yXq9dUWc4REvBobSVLeKlvg/edit?usp=sharing