These window grid retainer pins are constructed of plastic bodies with steel needle point pins, and they come clear in color. They feature a 5/8 inch long plastic shafts and 1/2 inch long plastic retainer sleeves, ideal for mounting mullion grids over the glass area of wood windows. These window grid retainer pins are used for securing decorative mullions to stationary and operating wood windows of all types and sizes. Sizes available from manufacturer include the following; 3/4 inch, 1-1/16 inch and 1-1/8 inch